FORM 10-Q
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                      FOR QUARTER ENDED SEPTEMBER 30, 2005

                         COMMISSION FILE NUMBER 0-12422

                        MAINSOURCE FINANCIAL GROUP, INC.
             (Exact name of registrant as specified in its charter)

           INDIANA                                         35-1562245
           -------                                         ----------
(State or other jurisdiction of                          (IRS Employer
 incorporation or organization)                       Identification No.)

       201 NORTH BROADWAY          GREENSBURG, INDIANA      47240
       ------------------------------------------------------------
       (Address of principal executive offices)          (Zip Code)

                                 (812) 663-0157
                                 --------------
              (Registrant's telephone number, including area code)

                                       N/A
             -------------------------------------------------------
             (Former name, former address and former fiscal year, if
                           changed since last report.)

     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.      Yes  X    No
                                                   ---      ---

     Indicate by check mark whether the registrant is an  accelerated  filer (as
defined in Rule 12b-2 of the Exchange Act).    Yes  X    No
                                                   ---      ---

     Indicate  by check mark  whether  the  registrant  is a shell  company  (as
defined in Rule 12b-2 of the Exchange Act).    Yes       No  X
                                                   ---      ---

     As of November 8, 2005 there were outstanding  13,471,128  shares of common
stock, without par value of the registrant.






                        MAINSOURCE FINANCIAL GROUP, INC.

                                    FORM 10-Q

                                      INDEX


- ------------------------------------------------------------------------------
PART I.  FINANCIAL INFORMATION                                           Page

Item 1.  Financial Statements

Consolidated Balance Sheets                                               3

Consolidated Statements of Income and Comprehensive Income                4

Consolidated Statements of Cash Flows                                     5

Notes to Consolidated Financial Statements                                6

Item 2.  Management's Discussion and Analysis of Financial                13
         Condition and Results of Operations

Item 3.  Quantitative and Qualitative Disclosures About Market Risk       20

Item 4.  Controls and Procedures                                          21

PART II.  OTHER INFORMATION

Item 6.  Exhibits                                                         22

Signatures                                                                24








                           MAINSOURCE FINANCIAL GROUP
                           CONSOLIDATED BALANCE SHEETS
               (Dollar amounts in thousands except per share data)


                                             (Unaudited)
                                            September 30,         December 31,
                                                2005                  2004
                                           ---------------       ---------------
Assets
                                                           
  Cash and due from banks                  $       51,129        $       71,607
  Money market and federal funds sold                 782                 4,662
                                           ---------------       ---------------
       Cash and cash equivalents                   51,911                76,269
  Interest bearing time deposits                      -                     304
  Investment securities
    Available for sale                            472,363               425,443
    Held to maturity (fair value of
      $0 and $3,414)                                  -                   3,243
                                           ---------------       ---------------
         Total investment securities              472,363               428,686
  Loans held for sale                               2,010                   824
  Loans, net of allowance for loan
    losses of $12,463 and $11,698                 964,937               917,307
  Restricted stock, at cost                        10,929                 7,902
  Premises and equipment, net                      28,131                25,766
  Goodwill                                         55,560                40,642
  Purchased intangible assets                       5,544                 6,429
  Cash surrender value of life insurance           25,135                24,776
  Interest receivable and other assets             22,990                20,474
                                           ---------------       ---------------
         Total assets                      $    1,639,510        $    1,549,379
                                           ===============       ===============

Liabilities
  Deposits
    Noninterest bearing                    $      166,009        $      145,999
    Interest bearing                            1,152,822             1,080,368
                                           ---------------       ---------------
         Total deposits                         1,318,831             1,226,367
  Short-term borrowings                            54,884                57,175
  Federal Home Loan Bank (FHLB) advances           61,627                90,981
  Subordinated debentures                          29,898                29,898
  Notes payable                                       -                   9,100
  Other liabilities                                12,737                12,538
                                           ---------------       ---------------
         Total liabilities                      1,477,977             1,426,059
                                           ---------------       ---------------

Shareholders' equity
  Preferred stock, no par value
    Authorized shares - 400,000
    Issued and outstanding shares - none              -                     -
  Common stock $.50 stated value:
    Authorized shares - 25,000,000
    Issued shares - 13,755,409 and
      11,196,357
    Outstanding shares - 13,471,128
      and 10,985,121                                6,880                 5,600
  Common stock to be distributed, 0 and
    559,818 shares                                    -                     280
  Treasury stock - 284,281 and 211,236,
    at cost                                        (4,860)               (3,479)
  Additional paid-in capital                      105,102                73,451
  Retained earnings                                55,277                47,371
  Accumulated other comprehensive income             (866)                   97
                                           ---------------       ---------------
         Total shareholders' equity               161,533               123,320
                                           ---------------       ---------------
         Total liabilities and
         shareholders' equity              $    1,639,510        $    1,549,379
                                           ===============       ===============

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.




                                       3








                           MAINSOURCE FINANCIAL GROUP
           CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME


                                     Three months ended      Nine months ended
                                        September 30,           September 30,
(Dollar amounts in thousands          2005       2004         2005       2004
except per share data)             ---------------------   ----------  ---------

Interest income
                                                           
  Loans, including fees            $  15,871  $  15,022    $  45,670   $ 41,953
  Investment securities                4,661      3,948       12,994     11,207
  Other interest income                   66         15          160         46
                                   ---------------------   ----------  ---------
    Total interest income             20,598     18,985       58,824     53,206
                                   ---------------------   ----------  ---------
Interest expense
  Deposits                             5,061      3,948       13,924     11,856
  Subordinated debentures                493      1,095        1,423      2,847
  Other borrowings                     1,415        442        3,958      1,247
                                   ---------------------   ----------  ---------
    Total interest expense             6,969      5,485       19,305     15,950
                                   ---------------------   ----------  ---------
Net interest income                   13,629     13,500       39,519     37,256
  Provision for loan losses              480        270          940        330
                                   ---------------------   ----------  ---------
Net interest income after
  Provision for loan losses           13,149     13,230       38,579     36,926
Non-interest income
  Insurance commissions                  435        706        1,545      2,095
  Mortgage banking                       805        701        2,030      2,419
  Trust and investment product
    fees                                 282        228          846        670
  Service charges on deposit
    accounts                           1,964      1,931        5,435      5,189
  Net realized gains on securities        18         44          242        817
  Increase in CSV of BOLI                222        254          663        766
  Interchange income                     506        474        1,469      1,342
  Other income                           713        445        2,133      1,394
                                   ---------------------   ----------  ---------
    Total non-interest income          4,945      4,783       14,363     14,692
                                   ---------------------   ----------  ---------
Non-interest expense
  Salaries and employee benefits       6,835      6,388       20,597     19,468
  Net occupancy expenses                 870        824        2,593      2,344
  Equipment expenses                     952      1,047        2,967      2,911
  Intangibles amortization               295        296          885        762
  Telecommunications                     434        409        1,233      1,173
  Stationery printing and supplies       271        253          685        722
  Other expenses                       2,416      2,430        7,070      6,927
                                   ---------------------   ----------  ---------
    Total non-interest expense        12,073     11,647       36,030     34,307
                                   ---------------------   ----------  ---------
Income before income tax               6,021      6,366       16,912     17,311
  Income tax expense                   1,489      1,760        4,264      4,751
                                   ---------------------   ----------  ---------
Net income                         $   4,532  $   4,606    $  12,648   $ 12,560
                                   =====================   ==========  =========

Comprehensive income               $   4,134  $   9,382    $  11,759   $ 12,857
                                   =====================   ==========  =========

Cash dividends declared per share  $    0.13  $    0.12    $    0.39   $   0.35

Net income per share - basic and
diluted                            $    0.34  $    0.40    $    1.03   $   1.11

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.




                                       4








                           MAINSOURCE FINANCIAL GROUP
                      CONSOLIDATED STATEMENTS OF CASH FLOW
                             (Dollars in thousands)

                                                                                              Nine months ended
                                                                                                September 30,
                                                                                             2005             2004
- -------------------------------------------------------------------------------------------------------   ---------------
Operating Activities
                                                                                                     
  Net income                                                                              $    12,648      $    12,560
  Adjustments to reconcile net income to net cash
  provided by operating activities:
     Provision for loan losses                                                                    940               330
     Depreciation and amortization                                                              2,313             2,210
     Securities amortization, net                                                               1,063             1,932
     Amortization of core deposit intangibles                                                     885               762
     Increase in cash surrender value of life insurance policies                                 (663)             (527)
     Gain on life insurance benefit                                                               (85)              -
     Investment securities gains                                                                 (242)             (817)
     Change in loans held for sale                                                             (1,186)             (170)
     Change in other assets and liabilities                                                    (2,132)            1,711
                                                                                         --------------   ---------------
        Net cash provided by operating activities                                              13,541            17,991

Investing Activities
  Net change in short-term investments                                                            304                -
  Proceeds from maturities and payments
   on securities held to maturity                                                                 277                237
  Purchases of securities available for sale                                                 (164,517)          (132,136)
  Proceeds from maturities and payments
   on securities available for sale                                                            92,313             74,621
  Proceeds from sales of securities available for sale                                         25,534             69,764
  Purchases of restricted stock                                                                (2,834)              (640)
  Proceeds from life insurance benefit                                                            400                -
  Loan originations and payments, net                                                           5,765             (8,618)
  Purchases of premises and equipment                                                          (2,949)            (1,790)
  Cash received/(paid) for bank acquisitions, net                                             112,885               (342)
                                                                                         --------------   ---------------
     Net cash provided (used) by investing activities                                          67,178              1,096

Financing Activities
  Net change in deposits                                                                      (92,240)           (56,727)
  Net change in short-term borrowings                                                          (2,291)            13,795
  Repayment of long-term debt                                                                  (9,100)            (2,100)
  Proceeds from FHLB advances                                                                 220,000             78,500
  Repayment of FHLB advances                                                                 (249,354)           (41,860)
  Proceeds from stock issue                                                                    32,667                -
  Purchase of treasury shares                                                                     (27)            (1,153)
  Cash dividends and fractional stock dividends                                                (4,760)            (4,003)
  Proceeds from exercise of stock options                                                          28                 28
                                                                                         --------------   ---------------
     Net cash provided (used) by financing activities                                        (105,077)           (13,520)
                                                                                         --------------   ---------------
Net change in cash and cash equivalents                                                       (24,358)             5,567
Cash and cash equivalents, beginning of year                                                   76,269             56,854
                                                                                         --------------   ---------------
Cash and cash equivalents, end of year                                                    $    51,911      $      62,421
                                                                                         ==============   ===============


See  Note 3  regarding  non-cash  transactions  included  in  acquisitions.
The  accompanying  notes are an integral  part of these  consolidated  financial
statements.





                                       5







NOTE 1 - BASIS OF PRESENTATION

The significant accounting policies followed by MainSource Financial Group, Inc.
("Company") for interim  financial  reporting are consistent with the accounting
policies  followed for annual  financial  reporting.  The  consolidated  interim
financial  statements  have been  prepared  according to  accounting  principles
generally  accepted in the United States of America and in  accordance  with the
instructions  for  Form  10-Q.  The  interim   statements  do  not  include  all
information and footnotes normally included in the annual financial  statements.
All  adjustments  which are, in the opinion of management,  necessary for a fair
presentation  of the results for the periods  reported have been included in the
accompanying   unaudited   consolidated   financial   statements  and  all  such
adjustments  are of a normal  recurring  nature.  Some  items  in  prior  period
financial statements were reclassified to conform to current presentation.














                                        6






NOTE 2 - STOCK COMPENSATION

Employee  compensation expense for stock options is reported using the intrinsic
value method.  No stock-based  compensation  cost is reflected in net income, as
all options  granted had an exercise  price equal to or greater  than the market
price of the  underlying  common  stock at date of grant.  The  following  table
illustrates  the  effect on net  income and  earnings  per share if expense  was
measured using the fair value recognition  provisions of FASB Statement No. 123,
Accounting for Stock-Based Compensation.






                                    For the three months    For the nine months
                                          ended                   ended
                                   ---------------------   ---------------------
                                   9/30/2005   9/30/2004   9/30/2005   9/30/2004
                                   ---------   ---------   ---------   ---------
                                                            
Net income as reported               $4,532      $4,606     $12,648     $12,560
Deduct: Stock-based compensation
    expense determined under fair
    value based method                   39          20         119          71
                                   ---------   ---------   ---------   ---------
Pro forma net income                 $4,493      $4,586     $12,529     $12,489

Basic earnings per share as
reported                              $0.34       $0.40       $1.03       $1.11
Pro forma basic earnings per share    $0.33       $0.40       $1.02       $1.11

Diluted earnings per share as
reported                              $0.34       $0.40       $1.03       $1.11
Pro forma diluted earnings
per share                             $0.33       $0.40       $1.02       $1.10







The pro forma  effects  are  computed  using  option  pricing  models,  with the
following  weighted-average  assumptions  for 2005 as of grant  date:  risk-free
interest  rate 4.07%,  expected  option life 6.82  years,  expected  stock price
volatility   21.66%  and  dividend   yield  2.50%.   For  2004,   the  following
weighted-average assumptions were used as of grant date: risk-free interest rate
3.48%,  expected option life 6.69 years,  expected stock price volatility 20.33%
and dividend yield 2.75%.


                                       7






NOTE 3 - ACQUISITIONS

In August 2005, the Company  consummated  its  acquisition of The Madison Bank &
Trust  Company  ("Madison").  As of the date of  acquisition,  Madison  had four
branches  in  Jefferson  County  and one in  Ohio  County.  Simultaneous  to the
closing, the Company closed one of the acquired branches in Jefferson County and
two  of  its  existing  branches  in  Jefferson  County.  As a  result  of  this
acquisition, the Company expects to expand its geographical presence in southern
Indiana,  increase its customer base to enhance  deposit fee income,  provide an
opportunity to market  additional  products and services to new  customers,  and
reduce  operating  costs  through   economies  of  scale.  As  of  the  date  of
acquisition,  the acquired  company had  $142,046 of cash and cash  equivalents,
$54,335 of net loans,  and  $184,704 of  deposits.  Goodwill of $16,249 was also
recorded.  As of the date of this  report,  the  Company  was in the  process of
obtaining third party valuations and completing fair value estimates for certain
assets  acquired and  liabilities  assumed,  and the  allocation of the purchase
price is subject to  refinement.  This would  include a core deposit  intangible
that would reduce goodwill.  The results of operations for this acquisition have
been included since the transaction date which was August 26, 2005.

In March 2005,  the  Company  disposed of the  Kentucky  division of  MainSource
Insurance to its previous owners. The consideration  received by the Company was
shares of the Company's common stock with an approximate value of $1,380.

In June 2004, the Company  consummated its acquisition of Peoples Financial Corp
("PFC").  At the date of  acquisition,  PFC had seven  branches  located  in the
southwestern  part of Indiana.  The acquired company had $4,320 of cash and cash
equivalents,  $81,371 of net loans,  and  $99,717 of  deposits.  A core  deposit
intangible of $2,141 and goodwill of $4,595 were also  recorded.  The results of
operations for this  acquisition  have been included since the transaction  date
which was June 8, 2004.  The  Company  funded the  purchase  price of $13,588 by
issuing  471,685  shares of its common  stock valued at $18.92 per share per the
NASDAQ closing bid on June 7, 2004 and using $4,454 of cash on hand.

In August 2005,  the Company  executed a definitive  agreement to acquire  Union
Community Bancorp ("Union").  Union, which has approximately $265,000 in assets,
operates  six  Indiana  offices  located  in  Montgomery,  Fountain,  Warren and
Tippecanoe  Counties.  The transaction is expected to close in the first quarter
of 2006.

In  September  2005,  the Company  executed a  definitive  agreement  to acquire
Peoples Ohio Financial Corporation ("Peoples"). Peoples, which has approximately
$200,000 in assets,  operates  six Ohio  offices  located in Miami and  Northern
Montgomery  Counties.  The transaction is expected to close in the first quarter
of 2006.

In October  2005,  the Company  executed a  definitive  agreement to acquire HFS
Bank, F.S.B. ("HFS"). HFS, which has approximately $236,000 in assets,  operates
a total of six offices in Hobart,  Portage,  Griffith and Crown Point,  Indiana.
The transaction is expected to close in the second quarter of 2006.


                                        8






NOTE 4 - SECURITIES

The  fair  value  of  securities  available  for  sale  and  related  unrealized
gains/losses recognized in accumulated other comprehensive income (loss) were as
follows:



                                                              Gross            Gross
                                               Fair         Unrealized      Unrealized
As of September 30, 2005                      Value           Gains           Losses
- -----------------------------------------------------------------------------------------
Available for Sale
                                                                        
  US Treasury & Federal agencies              $73,368            $145           ($936)
  State and municipal                         120,726          $1,941            (601)
  Mortgage-backed securities                  260,730            $525          (3,245)
  Equity and other securities                  17,539            $535             (84)
- -----------------------------------------------------------------------------------------
   Total available for sale                  $472,363          $3,146         ($4,866)
- -----------------------------------------------------------------------------------------

As of December 31, 2004
- -----------------------------------------------------------------------------------------
Available for Sale
  US Treasury & Federal agencies              $56,557            $152           ($388)
  State and municipal                          88,338           1,546            (583)
  Mortgage-backed securities                  262,690           1,005          (1,924)
  Equity and other securities                  17,858             427             (60)
- -----------------------------------------------------------------------------------------
   Total available for sale                  $425,443          $3,130         ($2,955)
- -----------------------------------------------------------------------------------------



The carrying amount, unrecognized gains and losses, and fair value of securities
held to maturity were as follows:



                                                              Gross            Gross
                                            Carrying       Unrecognized    Unrecognized          Fair
As of September 30, 2005                     Amount           Gains           Losses            Value
- ----------------------------------------------------------------------------------------------------------
Held to Maturity
                                                                                        
  State and municipal                            $-              $-              $-               $-
  Other securities                                -               -               -                -
- ----------------------------------------------------------------------------------------------------------
   Total held to maturity                        $-              $-              $-               $-
- ----------------------------------------------------------------------------------------------------------

As of December 31, 2004
- ----------------------------------------------------------------------------------------------------------
Held to Maturity
  State and municipal                          $2,439             $74            $-             $2,513
  Other securities                                804              97             -                901
- ----------------------------------------------------------------------------------------------------------
   Total held to maturity                      $3,243            $171            $-             $3,414
- ----------------------------------------------------------------------------------------------------------




During the third quarter of 2005,  management  transferred all  held-to-maturity
securities to the available-for-sale category. The redesignation resulted in the
transfer  of  securities  with an  amortized  cost of $3,005 and a fair value of
$3,113 from held-to-maturity to available-for-sale. This transfer resulted in an
increase to shareholders' equity of $70 as of September 30, 2005.







                                       9




NOTE 5 - LOANS AND ALLOWANCE



                                                September 30,    December 31,
                                                   2005             2004
- --------------------------------------------------------------------------------

                                                           
Commercial and industrial loans                 $    146,993     $   154,717
Agricultural production financing                     27,287          22,647
Farm real estate                                      37,383          38,281
Commercial real estate                               160,242         133,360
Hotel                                                 59,593          80,234
Residential real estate                              375,661         353,515
Construction and development                          46,002          37,821
Consumer                                             124,239         108,430
                                                -------------    ---------------
      Total loans                                    977,400         929,005
                                                -------------    ---------------
Allowance for loan lossess                           (12,463)        (11,698)
- --------------------------------------------------------------------------------
      Net loans                                 $    964,937     $   917,307
- --------------------------------------------------------------------------------


Activity in the allowance for loan losses was as follows:
- --------------------------------------------------------------------------------
                                                      2005             2004
- --------------------------------------------------------------------------------
Allowance for loan losses
    Balances, January 1                         $     11,698     $    11,509
    Addition resulting from acquisition                1,500           1,775
    Provision for losses                                 940             330
    Recoveries on loans                                  213             259
    Loans charged off                                 (1,888)         (1,974)
- --------------------------------------------------------------------------------
    Balances, September 30                      $     12,463     $    11,899
- --------------------------------------------------------------------------------




                                       10




NOTE 6 - DEPOSITS



                                                September 30,    December 31,
                                                   2005             2004
                                                --------------   --------------
                                                                  
   Non-interest-bearing demand                  $     166,009    $     145,999
   Interest-bearing demand                            307,109          310,306
   Savings                                            323,904          304,230
   Certificates of deposit of $100 or more            155,094          117,361
   Other certificates and time deposits               366,715          348,471
                                                --------------   --------------
      Total deposits                            $   1,318,831    $    1,226,367
                                                ==============   ==============




                                       11





NOTE 7 - EARNINGS PER SHARE



Earnings per share (EPS) were computed as follows:

For the three months ended                         September 30, 2005                                 September 30, 2004
                                      ---------------------------------------------     -------------------------------------------
                                                       Weighted            Per                             Weighted            Per
                                         Net           Average            Share             Net            Average            Share
                                       Income           Shares           Amount            Income           Shares            Amount
Basic earnings per share:
Income available to
                                                                                                             
  common shareholders                    $4,532        13,431,432            $0.34            $4,606       11,548,090         $0.40
                                      ----------                       ------------     -------------                      --------
Effect of dilutive shares                                  12,059                                              11,866
                                                    ---------------                                       ---------------
Diluted earnings per share               $4,532        13,443,491            $0.34            $4,606       11,559,956         $0.40
                                      ==========    ===============    ============     =============     ===============  ========


For the nine months ended                          September 30, 2005                                 September 30, 2004
                                      ---------------------------------------------     -------------------------------------------
                                                       Weighted            Per                             Weighted            Per
                                         Net           Average            Share             Net            Average            Share
                                       Income           Shares           Amount            Income           Shares            Amount
Basic earnings per share:
Income available to
  common shareholders                   $12,648        12,239,519            $1.03           $12,560       11,294,121         $1.11
                                      ----------                       ------------     -------------                      --------
Effect of dilutive shares                                  14,655                                              15,308
                                                    ---------------                                       ---------------
Diluted earnings per share              $12,648        12,254,174            $1.03           $12,560       11,309,429         $1.11
                                      ==========    ===============    ============     =============     ===============  ========



Stock  options  for  128,425  shares  of common  stock  were not  considered  in
computing diluted earnings per common share for the three months and nine months
ended September 30, 2005 because they were antidilutive.





                                       12






                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)


Item 2.

Overview

MainSource Financial Group, Inc. ("Company") is a multi-bank,  financial holding
company that  provides an array of financial  services and is  headquartered  in
Greensburg,  Indiana.  The Company's  shares trade on the NASDAQ national market
under the symbol MSFG. On September 30, 2005, the Company  controlled three bank
subsidiaries,  MainSource Bank,  MainSource Bank of Illinois,  and Peoples Trust
Company ("Peoples"). In addition to the banking subsidiaries,  the Company owned
the following  subsidiaries:  MainSource  Insurance,  LLC, MainSource  Statutory
Trust I,  MainSource  Statutory  Trust II,  MainSource  Statutory Trust III, IUB
Reinsurance Company,  Ltd., MSB Investments of Nevada,  Inc.,  MainSource Title,
LLC, and MainSource  Mortgage,  LLC. As required by current accounting guidance,
the trusts are no longer consolidated with the Company. Accordingly, the Company
does not report the securities issued by the trusts as liabilities,  and instead
reports as liabilities the subordinated debentures issued by the Company. During
the first quarter of 2005, the Company sold the Kentucky  division of MainSource
Insurance at its  approximate  book value.  In October 2005,  the Company merged
Peoples into MainSource Bank.

In June 2005,  the Company  completed a public  offering  of  approximately  1.7
million shares of its common stock at a price to the public of $17.50 per share,
resulting in net proceeds of $28,490.  On July 8, 2005, the Company sold 260,860
additional  shares pursuant to the over allotment option on the public offering,
resulting in additional net proceeds of approximately $4,177.

The Company continues to actively pursue various acquisition opportunities,  and
we expect to  continue  to review such  opportunities  in the future,  including
branches, whole banks, and other financial service providers.

Forward-Looking Statements

Except for historical  information contained herein, the discussion in this Form
10-Q quarterly  report includes  certain  forward-looking  statements based upon
management expectations. Factors which could cause future results to differ from
these  expectations  include  the  following:  an  inability  to  find  suitable
acquisition candidates, or unexpected losses or expenses from acquisitions; loss
of key  management  personnel;  general  economic  conditions;  legislative  and
regulatory initiatives;  monetary and fiscal policies of the federal government;
deposit flows;  the costs of funds;  general market rates of interest;  interest
rates on competing investments;  demand for loan products;  demand for financial
services;  changes in  accounting  policies  or  guidelines;  and changes in the
quality or composition of the Company's loan and investment portfolios.

The  forward-looking  statements  included in the  Management's  Discussion  and
Analysis  ("MD&A")  involve  risks  and  uncertainties,   including  anticipated
financial  performance,  business  prospects,  and other similar matters,  which
reflect  management's  best judgment based on factors  currently  known.  Actual
results and experience could differ  materially from the anticipated  results or
other expectations  expressed in the Company's  forward-looking  statements as a
result of a number of factors,  including but not limited to those  discussed in
the MD&A and in the Company's other public filings.

Results of Operations

Net income for the third  quarter of 2005 was $4,532  compared to $4,606 for the
third quarter of 2004.  Diluted earnings per share for the third quarter totaled
$0.34 in 2005,  which includes the effect of the Company's two million shares of
common stock issued in its public offering in June and July of 2005. The Company
was not able to fully utilize the new capital  generated from the offering until
the close of its acquisition of Madison,  which occurred on August 26, 2005. The
funds dedicated to this  acquisition were invested in  highly-liquid,  low-yield
investments.  Excluding  the  effect  of the  additional  shares  issued  in the
offering and the merger expenses related to the aforementioned acquisition,  the
Company's earnings per share would have been $0.38 for the third quarter of 2005
compared to $0.40 for the same period a year ago. The results of operations  for
the Madison  acquisition have been included since the transaction  date. For the
nine months ended September 30, 2005, the Company reported earnings per share of
$1.03,  which  represents a 7.2% decrease versus the $1.11 reported for the same
period a year ago.

                                       13




                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)


Net Interest Income

The  volume  and  yield  of  earning  assets  and  interest-bearing  liabilities
influence  net  interest  income.  Net  interest  income  reflects  the  mix  of
interest-bearing and non-interest-bearing  liabilities that fund earning assets,
as well as interest  spreads  between the rates  earned on these  assets and the
rates paid on interest-bearing liabilities. Third quarter net interest income of
$13,629  in 2005 was an  increase  of 1.0%  versus  the third  quarter  of 2004.
Average  earning  assets  increased  2.7%  while  net  interest  margin,   on  a
fully-taxable  equivalent  basis,  declined slightly and was 3.93% for the third
quarter of 2005  compared  to 3.97% for the same period a year ago. On a year to
date basis,  net  interest  income  increased to $39,519 in 2005 from $37,256 in
2004.  This increase was primiarly  attributable  to the full year effect of the
Peoples  acquisition and a slight increase in the Company's interest margin. For
the nine months ended  September 30, 2005, the Company's net interest margin was
3.93% versus 3.85% a year ago.

Provision for Loan Losses

See "Loans,  Credit Risk and the  Allowance  and  Provision  for  Probable  Loan
Losses" below.

Non-interest Income

Third quarter non-interest income for 2005 was $4,945 compared to $4,783 for the
third quarter of 2004.  This increase was primarily  attributable to an increase
in mortgage  banking  income of $104 and an increase in other  income  primarily
related to the Company's  newly-formed  title insurance agency.  Offsetting this
increase was a decrease in insurance commissions due to the sale of the Kentucky
division of MainSource Insurance during the first quarter of 2005.

For the nine months ended  September 30, 2005,  non-interest  income was $14,363
compared  to  $14,692  for the same  period a year ago.  The 2.2%  decrease  was
primarily attributable to a decrease in insurance commissions due to the sale of
the Kentucky division of MainSource  Insurance.  In addition,  as interest rates
moved  higher  over the last year the  Company  incurred a decrease  in mortgage
banking  income and lower gains on sales of  investment  securities.  Offsetting
these  decreases were increases in trust and  investment  product fees,  service
charges on deposit accounts,  and other income. The increase in other income was
primarily due to income at the  newly-formed  title and mortgage  companies,  an
increase in contingency income at the Company's insurance division, and the full
year effect of the Peoples acquisition.


                                       14




                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)

Non-interest Expense

Total non-interest expense was $12,073 for the third quarter of 2005 compared to
$11,647 for the same period a year ago.  This 3.7%  increase  was  primarily  in
employee-related   expenses  and  was  attributable  to  normal  employee  merit
increases,  staff  increases  associated  with the  acquisition of Madison,  and
increased benefit costs.

For the nine months ended September 30, 2005,  non-interest  expense was $36,030
compared to $34,307 for the same period in 2004.  The year over year increase of
$1,723 was primarily in  employee-related  expenses.  Employee  costs  increased
$1,129,  or 5.8%,  for the nine months ended  September 30, 2005 compared to the
same period a year ago. This increase was mainly  attributable  to the full year
effect of the Peoples  acquisition  which  occurred in June 2004,  normal  merit
increases,  and increased  benefit costs.  Occupancy  expenses also increased by
$249, or 10.6%, due to the full year effect of the Peoples acquisition.

Income Taxes

The  effective tax rate for the first nine months was 25.2% for 2005 compared to
27.4% for the same period a year ago.  The decrease in the  Company's  effective
tax rate was primarily  attributable to increased income from tax-free municipal
securities.  The  Company  and its  subsidiaries  file  consolidated  income tax
returns.









                                       15




                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)

Financial Condition

Total assets at September 30, 2005 were $1,639,510  compared to $1,549,379 as of
December 31, 2004.  Average  earning assets  represented  90.2% of average total
assets for the first nine  months of 2005 and 2004.  Average  loans  represented
76.3% of average  deposits  in the first  nine  months of 2005 and 75.2% for the
comparable period in 2004. Management continues to emphasize quality loan growth
to increase  these  averages.  Average loans as a percent of average assets were
60.1% and 60.5% for the  nine-month  periods  ended  September 30, 2005 and 2004
respectively.

The increase in deposits of $92,464 from December 31, 2004 to September 30, 2005
was due  primarily to the  acquisition  of Madison.  This increase was partially
offset  by a  decrease  in time  deposits  as the  Company  has  elected  to not
aggressively  pursue these  higher-cost  deposits given its relatively flat loan
growth.

Shareholders'  equity was $161,533 on September 30, 2005 compared to $123,320 on
December 31, 2004. Book value (shareholders' equity) per common share was $11.99
at  September  30,  2005  versus  $10.68 at  year-end  2004.  Accumulated  other
comprehensive  income  decreased  book value per share by $0.06 at September 30,
2005 and increased book value per share $0.01 at December 31, 2004. Depending on
market conditions,  the unrealized gain or loss on securities available for sale
can cause fluctuations in shareholders' equity.

Loans, Credit Risk and the Allowance and Provision for Probable Loan Losses

Loans remain the Company's largest concentration of assets and, by their nature,
carry a higher degree of risk. The loan underwriting  standards  observed by the
Company's  subsidiaries  are  viewed  by  management  as a means of  controlling
problem loans and the resulting charge-offs.

The Company  believes  credit risks may be elevated if undue  concentrations  of
loans in specific industry  segments and to out-of-area  borrowers are incurred.
Accordingly,   the  Company's  Board  of  Directors   regularly   monitors  such
concentrations  to determine  compliance  with its loan allocation  policy.  The
Company believes it has no undue concentrations of loans.


                                       16




                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)

Residential real estate loans continue to represent a significant portion of the
total loan portfolio.  Such loans  represented 38.4% of total loans at September
30, 2005 and 38.1% at December 31, 2004.

On September 30, 2005, the Company had $2,010 of  residential  real estate loans
held for sale,  which was an increase  from the  year-end  balance of $824.  The
Company generally retains the servicing rights on mortgages sold.

Non-performing assets totaled $15,391, or 0.94% of total assets, as of September
30, 2005,  compared to $14,326,  or 0.93% of total assets,  as of June 30, 2005,
and $17,548, or 1.18% of assets at March 31, 2005. The allowance for loan losses
was $12,463 as of September 30, 2005 and represented  1.28% of total outstanding
loans compared to $11,698 as of December 31, 2004 or 1.26% of total  outstanding
loans.  The allowance for loan losses  balance as of September 30, 2005 includes
$1,500  acquired in the Madison  acquisition  and is subject to adjustment  upon
completion of final purchase price allocation.

The  provision for loan losses was $480 in the third quarter of 2005 compared to
$270 for the same  period in 2004.  The  increase in the  provision  in 2005 was
primarily  attributable to the increase in the balance of  non-performing  loans
versus the prior  year and the  corresponding  increase  in  specific  allowance
allocations for these loans.  Although charge-offs have been relatively high for
2005 compared to the provision  expense,  the majority of these charge-offs were
allocated for in previous periods. The adequacy of the allowance for loan losses
in each  subsidiary is reviewed at least  quarterly.  The  determination  of the
provision  amount in any period is based on management's  continuing  review and
evaluation  of loan loss  experience,  changes  in the  composition  of the loan
portfolio,   current  economic   conditions,   the  amount  of  loans  presently
outstanding,  and information about specific borrower situations.  The allowance
for loan losses as of September 30, 2005 was considered adequate by management.

Investment Securities

Investment  securities offer flexibility in the Company's management of interest
rate risk and are an  important  source of  liquidity  as a response to changing
characteristics of assets and

                                       17




                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)

liabilities.  The Company's  investment policy prohibits trading  activities and
does not allow  investment  in  high-risk  derivative  products,  junk  bonds or
foreign investments.

As of September 30, 2005,  $472,363 of investment  securities were classified as
"available  for sale"  ("AFS")  and were  carried at fair value with  unrealized
gains  and  losses,   net  of  taxes,   reported  as  a  separate  component  of
shareholders'  equity.  An  unrealized  pre-tax  loss of $1,720 was  recorded to
adjust the AFS portfolio to current market value at September 30, 2005, compared
to an unrealized pre-tax gain of $175 at December 31, 2004. Unrealized losses on
AFS securities have not been  recognized into income because  management has the
intent and ability to hold these  securities for the foreseeable  future and the
decline in fair value is largely due to increases in market interest rates.  The
fair value is  expected to recover as the  securities  approach  their  maturity
dates.

Sources of Funds

The  Company  relies  primarily  on  customer  deposits,  securities  sold under
agreement to repurchase and  shareholders'  equity to fund earning assets.  FHLB
advances are also used to provide additional funding.

Deposits  generated within local markets provide the major source of funding for
earning  assets.  Average total deposits funded 87.2% and 89.2% of total average
earning  assets for the nine-month  periods ending  September 30, 2005 and 2004.
Total  interest-bearing  deposits  averaged  88.4%  and 89.3% of  average  total
deposits  for the  nine-month  periods  ending  September  30,  2005  and  2004,
respectively.  Management  constantly  strives to  increase  the  percentage  of
transaction-related  deposits to total  deposits due to the  positive  effect on
earnings.

The Company had FHLB  advances of $61,627  outstanding  at  September  30, 2005.
These  advances have interest  rates ranging from 2.36% to 6.27%.  Approximately
$20,000 of these  advances was obtained for short-term  liquidity  needs and had
original  maturities  of  six  months  or  less.  The  remaining  advances  were
originally  long-term  advances  with  approximately  $15,000  maturing in 2007,
$5,000 maturing in 2010 and $20,000 maturing in 2012.

Capital Resources

Total  shareholders'  equity was  $161,533 at September  30, 2005,  which was an
increase of $38,213 compared to the $123,320 of shareholders' equity at December
31, 2004. In June 2005, the Company completed a public offering of approximately
1.7 million  shares of common  stock.  The net proceeds  from the offering  were
$28,490,  net of the  underwriting  discount  and  expenses.  In July 2005,  the
Company sold  additional  shares of common stock  pursuant to the over allotment
option granted in the offering, raising additional net proceeds of approximately
$4,177.

The Federal Reserve Board and other regulatory  agencies have adopted risk-based
capital  guidelines that assign risk weightings to assets and off-balance  sheet
items. The Company's core capital consists of  shareholders'  equity,  excluding
accumulated other  comprehensive  income,  while Tier 1 capital consists of core
capital less goodwill and  intangibles.  Trust preferred  securities  qualify as
Tier 1 capital or core capital with respect to the Company under the  risk-based
capital  guidelines  established by the Federal Reserve.  Under such guidelines,
capital  received  from the proceeds of the sale of trust  preferred  securities
cannot  constitute  more  than 25% of the total  core  capital  of the  Company.
Consequently,  the  amount of trust  preferred  securities  in excess of the 25%
limitation  constitutes Tier 2 capital of the Company.  Total regulatory capital
consists of Tier 1, certain debt  instruments and a portion of the allowance for
loan losses.  At September 30, 2005,  Tier 1 capital to total average assets was
8.52%.

                                       18




                        MAINSOURCE FINANCIAL GROUP, INC.
                                    FORM 10-Q
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
               (Dollar amounts in thousands except per share data)

Tier  1  capital  to   risk-adjusted   assets  was  12.39%.   Total  capital  to
risk-adjusted  assets was 13.58%.  All three ratios  exceed all required  ratios
established  for bank holding  companies.  Risk-adjusted  capital  levels of the
Company's  subsidiary banks exceed  regulatory  definitions of  well-capitalized
institutions.

The Company  declared and paid common  dividends of $0.13 per share in the third
quarter of 2005 versus $0.12 for the third quarter of 2004.  For the nine months
ended  September  30, 2005,  the Company  declared and paid common  dividends of
$0.39 per share compared to $0.35 for the same period a year ago.

Liquidity

Liquidity  management  involves  maintaining  sufficient  cash  levels  to  fund
operations and to meet the requirements of borrowers, depositors, and creditors.
Higher levels of liquidity bear higher corresponding costs, measured in terms of
lower yields on short-term,  more liquid  earning  assets,  and higher  interest
expense involved in extending liability  maturities.  Liquid assets include cash
and cash equivalents,  loans and securities  maturing within one year, and money
market instruments. In addition, the Company holds AFS securities maturing after
one year, which can be sold to meet liquidity needs.

Maintaining a relatively  stable funding base, which is achieved by diversifying
funding sources and extending the contractual maturity of liabilities,  supports
liquidity and limits reliance on volatile short-term purchased funds. Short-term
funding needs arise from declines in deposits or other funding sources,  funding
of loan  commitments  and requests for new loans.  The Company's  strategy is to
fund assets to the maximum  extent  possible  with core  deposits that provide a
sizable source of relatively  stable and low-cost  funds.  Average core deposits
funded  approximately  78.1% of total  earning  assets for the nine months ended
September 30, 2005 and 78.5% for the same period in 2004.

Management believes the Company has sufficient  liquidity to meet all reasonable
borrower,  depositor, and creditor needs in the present economic environment. In
addition, the Company's affiliates have access to the Federal Home Loan Bank for
borrowing  purposes.  The  Company has not  received  any  recommendations  from
regulatory authorities that would materially affect liquidity, capital resources
or operations.

Interest Rate Risk

Asset/liability  management  strategies  are  developed by the Company to manage
market risk. Market risk is the risk of loss in financial  instruments including
investments,  loans,  deposits and  borrowings  arising from adverse  changes in
prices/rates.  Interest rate risk is the Company's primary market risk exposure,
and represents the sensitivity of earnings to changes in market interest rates.

Effective asset/liability  management requires the maintenance of a proper ratio
between  maturing or repriceable  interest-earning  assets and  interest-bearing
liabilities.  It is the policy of the Company that the cumulative gap divided by
total assets must be not greater than plus or minus 20% at the 3-month, 6-month,
and 1-year time horizons.

At  September  30,  2005,  the  Company  held  $647,778 in assets  comprised  of
securities, loans, and short-term investments,  which were interest sensitive in
one year or less time horizons.























                                       19




Item 3. Quantitative and Qualitative Disclosures about Market Risk

Market risk of the Company  encompasses  exposure to both liquidity and interest
rate risk and is reviewed monthly by the Asset/Liability Committee and the Board
of  Directors.  There  have been no  material  changes in the  quantitative  and
qualitative  disclosures  about market  risks as of September  30, 2005 from the
analysis and  disclosures  provided in the Company's  Annual Report on Form 10-K
for the year ended December 31, 2004.






















                                       20




Item 4.  Controls and Procedures

As of the end of the quarterly period covered by this report,  an evaluation was
carried out under the  supervision and with the  participation  of the Company's
management,  including  the  Company's  Chief  Executive  Officer and  Principal
Financial Officer, of the effectiveness of the Company's disclosure controls and
procedures  (as defined in Rules  13a-15(e)  or 15d-15(e)  under the  Securities
Exchange Act of 1934 ("Exchange Act")). Based on their evaluation, the Company's
Chief Executive Officer and Principal  Financial Officer have concluded that the
Company's  disclosure  controls  and  procedures  were,  to the  best  of  their
knowledge,  effective to ensure that information required to be disclosed by the
Company in reports that it files or submits  under the Exchange Act is recorded,
processed,  summarized  and  reported  within  the  time  periods  specified  in
Securities and Exchange Commission rules and forms as of such date.

There was no change in the Company's  internal control over financial  reporting
that  occurred  during  the  Company's  third  fiscal  quarter  of 2005 that has
materially affected, or is reasonably likely to materially affect, the Company's
internal control over financial reporting.















                                       21




MAINSOURCE FINANCIAL GROUP, INC.

FORM 10-Q

PART II.  OTHER INFORMATION

Item 6.  Exhibits

          3.1  Restated Articles of Incorporation  (incorporated by reference to
               Exhibit 3.1 to the Annual  Report on Form 10-K of the  registrant
               for the fiscal year ended  December 31, 2003 filed March 12, 2004
               with the Commission (Commission File No. 0-12422)).

          3.2  Amended and Restated Bylaws dated April 28, 1998 (incorporated by
               reference  to Exhibit 3 to the Current  Report on Form 8-K of the
               registrant   filed   September  22,  2005  with  the   Commission
               (Commission File No. 0-12422)).


                                       22




          31.1 Certification  pursuant  to  Rule  13a-14(a)/15d-14(a)  by  Chief
               Executive Officer

          31.2 Certification  pursuant to Rule  13a-14(a)/15d-14(a) by Principal
               Financial Officer

     The following exhibits shall not be deemed filed for purposes of Section 18
of the Securities  Exchange Act of 1934, and are not  incorporated  by reference
into any filing  under the  Securities  Act or the Exchange  Act,  except to the
extent the Company specifically incorporates them by reference.

          32.1 Certification pursuant to Section 1350 by Chief Executive Officer

          32.2 Certification  pursuant to Section  1350 by  Principal  Financial
               Officer











                                       23




MAINSOURCE FINANCIAL GROUP, INC.

FORM 10-Q

SIGNATURES

     Pursuant to the  requirements  of the  Securities and Exchange Act of 1934,
the  Registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                   MAINSOURCE FINANCIAL GROUP, INC.


                   November 8, 2005

                   /s/ James L. Saner, Sr.
                   -------------------------------------------------
                   James L. Saner Sr.
                   President and Chief Executive Officer


                   November 8, 2005

                   /s/ James M. Anderson
                   -------------------------------------------------
                   James M. Anderson
                   Administrative Vice President & Principal Accounting Officer




                                       24





                                                                    EXHIBIT 31.1

       Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer

I, James L. Saner, Sr. certify that:


1. I have reviewed this  quarterly  report on Form 10-Q of MainSource  Financial
Group;

2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact  necessary to make the statements
made, in light of the  circumstances  under which such statements were made, not
misleading with respect to the period covered by this report;

3.  Based  on my  knowledge,  the  financial  statements,  and  other  financial
information included in this report, fairly present in all material respects the
financial  condition,  results of operations and cash flows of the registrant as
of, and for, the periods presented in this report;

4. The  registrant's  other  certifying  officer(s)  and I are  responsible  for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal  control over financial
reporting  (as defined in Exchange Act rules  13a-15(f) and  15d-15(f))  for the
registrant and have:

          (a) Designed such disclosure  controls and procedures,  or caused such
          disclosure   controls  and   procedures  to  be  designed   under  our
          supervision,  to ensure  that  material  information  relating  to the
          registrant,  including its consolidated subsidiaries, is made known to
          us by others within those entities,  particularly during the period in
          which this report is being prepared;

          (b) Designed such internal control over financial reporting, or caused
          such internal  control over  financial  reporting to be designed under
          our  supervision,   to  provide  reasonable  assurance  regarding  the
          reliability  of financial  reporting and the  preparation of financial
          statements for external purposes in accordance with generally accepted
          accounting principles;

          (c)  Evaluated  the  effectiveness  of  the  registrant's   disclosure
          controls and procedures  and presented in this report our  conclusions
          about the effectiveness of the disclosure controls and procedures,  as
          of the  end of the  period  covered  by  this  report  based  on  such
          evaluation; and

          (d) Disclosed in this report any change in the  registrant's  internal
          control over financial reporting that occurred during the registrant's
          most recent fiscal quarter (the registrant's  fourth fiscal quarter in
          the case of an annual  report)  that has  materially  affected,  or is
          reasonably  likely to materially  affect,  the  registrant's  internal
          control over financial reporting; and

5. The registrant's other certifying  officer(s) and I have disclosed,  based on
our most recent evaluation of internal control over financial reporting,  to the
registrant's  auditors  and the audit  committee  of the  registrant's  board of
directors (or persons performing the equivalent functions):

          (a) All significant deficiencies and material weaknesses in the design
          or operation of internal  control over financial  reporting  which are
          reasonably  likely to  adversely  affect the  registrant's  ability to
          record, process, summarize and report financial information; and

          (b) Any fraud,  whether or not material,  that involves  management or
          other  employees  who  have a  significant  role  in the  registrant's
          internal control over financial reporting.

Date: November 8, 2005

/s/ James L. Saner, Sr.
- -----------------------
James L. Saner, Sr.
President and Chief Executive Officer





                                                                    EXHIBIT 31.2

     Rule 13a-14(a)/15d-14(a) Certification of Principal Financial Officer

I, James M. Anderson, certify that:

1. I have reviewed this  quarterly  report on Form 10-Q of MainSource  Financial
Group;

2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact  necessary to make the statements
made, in light of the  circumstances  under which such statements were made, not
misleading with respect to the period covered by this report;

3.  Based  on my  knowledge,  the  financial  statements,  and  other  financial
information included in this report, fairly present in all material respects the
financial  condition,  results of operations and cash flows of the registrant as
of, and for, the periods presented in this report;

4. The  registrant's  other  certifying  officer(s)  and I are  responsible  for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal  control over financial
reporting  (as defined in Exchange Act rules  13a-15(f) and  15d-15(f))  for the
registrant and have:

          (a) Designed such disclosure  controls and procedures,  or caused such
          disclosure   controls  and   procedures  to  be  designed   under  our
          supervision,  to ensure  that  material  information  relating  to the
          registrant,  including its consolidated subsidiaries, is made known to
          us by others within those entities,  particularly during the period in
          which this report is being prepared;

          (b) Designed such internal control over financial reporting, or caused
          such internal  control over  financial  reporting to be designed under
          our  supervision,   to  provide  reasonable  assurance  regarding  the
          reliability  of financial  reporting and the  preparation of financial
          statements for external purposes in accordance with generally accepted
          accounting principles;

          (c)  Evaluated  the  effectiveness  of  the  registrant's   disclosure
          controls and procedures  and presented in this report our  conclusions
          about the effectiveness of the disclosure controls and procedures,  as
          of the  end of the  period  covered  by  this  report  based  on  such
          evaluation; and

          (d) Disclosed in this report any change in the  registrant's  internal
          control over financial reporting that occurred during the registrant's
          most recent fiscal quarter (the registrant's  fourth fiscal quarter in
          the case of an annual  report)  that has  materially  affected,  or is
          reasonably  likely to materially  affect,  the  registrant's  internal
          control over financial reporting; and

5. The registrant's other certifying  officer(s) and I have disclosed,  based on
our most recent evaluation of internal control over financial reporting,  to the
registrant's  auditors  and the audit  committee  of the  registrant's  board of
directors (or persons performing the equivalent functions):

          (a) All significant deficiencies and material weaknesses in the design
          or operation of internal  control over financial  reporting  which are
          reasonably  likely to  adversely  affect the  registrant's  ability to
          record, process, summarize and report financial information; and

          (b) Any fraud,  whether or not material,  that involves  management or
          other  employees  who  have a  significant  role  in the  registrant's
          internal control over financial reporting.


Date: November 8, 2005

/s/ James M. Anderson
- -----------------------
James M. Anderson
Administrative Vice President
and Principal Accounting Officer





                                                                    Exhibit 32.1



             SECTION 1350 CERTIFICATION BY CHIEF EXECUTIVE OFFICER


As an accompaniment to the Quarterly Report of MainSource  Financial Group, Inc.
(the  "Company") on Form 10-Q for the period ending  September 30, 2005 as filed
with the Securities and Exchange  Commission on the date hereof (the  "Report"),
I, James L. Saner Sr., Chief Executive Officer of the Company, certify, pursuant
to  18  U.S.C.  Section  1350,  as  adopted  pursuant  to  Section  906  of  the
Sarbanes-Oxley Act of 2002, that to my knowledge:

o    The Report fully complies with the  requirements  of section 13(a) or 15(d)
     of the Securities Exchange Act of 1934, and
o    The information  contained in the Report fairly  presents,  in all material
     respects,  the financial condition and results of operations of the Company
     as of and for the periods presented.

This  certification is based on inquiries that I have made, or have caused to be
made, in a good faith effort on my part to be a responsible  and competent chief
executive officer serving the Company and its many constituencies.

This certification  merely accompanies and is not part of the Report,  shall not
be deemed filed for purposes of the Securities Exchange Act of 1934, and may not
be used for any purpose other than  compliance  with 18 U.S.C.  Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.


Date:  November 8, 2005

/s/  James L. Saner, Sr.
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James L. Saner, Sr.










                                                                    Exhibit 32.2

           SECTION 1350 CERTIFICATION BY PRINCIPAL FINANCIAL OFFICER


As an accompaniment to the Quarterly Report of MainSource  Financial Group, Inc.
(the  "Company") on Form 10-Q for the period ending  September 30, 2005 as filed
with the Securities and Exchange  Commission on the date hereof (the  "Report"),
I, James M.  Anderson,  Principal  Accounting  Officer of the Company,  certify,
pursuant to 18 U.S.C.  Section 1350,  as adopted  pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that to my knowledge:

o    The Report fully complies with the  requirements  of section 13(a) or 15(d)
     of the Securities Exchange Act of 1934, and
o    The information  contained in the Report fairly  presents,  in all material
     respects,  the financial condition and results of operations of the Company
     as of and for the periods presented.

This  certification is based on inquiries that I have made, or have caused to be
made,  in a good  faith  effort  on my part to be a  responsible  and  competent
principal financial officer serving the Company and its many constituencies.

This certification  merely accompanies and is not part of the Report,  shall not
be deemed filed for purposes of the Securities Exchange Act of 1934, and may not
be used for any purpose other than  compliance  with 18 U.S.C.  Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.


Date:  November 8, 2005

/s/  James M. Anderson
- -----------------------
James M. Anderson