UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                    FORM 8-K



                                 CURRENT REPORT
     Pursuant to Section 13 or 15(b) of the Securities Exchange Act of 1934


        Date of Report (Date of earliest event reported): August 6, 2004



                                    MFB CORP.
             (Exact name of registrant as specified in its charter)



                                     INDIANA
                 (State or other jurisdiction of incorporation)



                0-23374                             35-1907258
       (Commission File Number)         (IRS Employer Identification No.)



           4100 Edison Lakes Parkway, Suite 300
                     P.O. Box 528
                   Mishawaka, Indiana                            46546
         (Address of principal executive offices)              (Zip Code)



       Registrant's telephone number, including area code: (574) 277-4200








Item 2. Acquisition or Disposition of Assets

     On August 6,  2004,  the  Registrant  completed  the  previously  announced
transaction whereby Registrant's  wholly-owned  subsidiary,  MFB Financial,  has
acquired  certain assets and assumed  certain  liabilities of Sobieski Bank (the
"Acquisition").

     Under the terms of the  agreement,  MFB Financial paid Sobieski Bank $1.156
million,  subject to post closing adjustments to be finalized within the next 10
days.

     As of June 30, 2004,  Sobieski Bank,  located in South Bend,  Indiana,  had
approximately  $105.1  million of assets  and  approximately  $102.4  million of
liabilities.  Among items excluded from the Acquisition under the agreement were
certain troubled and/or substandard assets,  including certain commercial loans,
real estate  owned,  assets  seized in  connection  with  litigation  related to
fraudulent  activity  affecting  Sobieski Bank, and other items. The transaction
was structured as an asset  purchase and MFB Financial  generally did not assume
any of any of Sobieski's contingent  liabilities.  Sobieski Bank and its holding
company,  Sobieski  Bancorp,  Inc.,  have  agreed to  indemnify  and protect MFB
Financial against liabilities not assumed by MFB Financial in the transaction.

     As a result of the  transaction,  Registrant  is expected  to increase  its
total assets to approximately  $548 million.  MFB Financial is now operating the
three Sobieski retail offices,  all located in South Bend, as branch  facilities
under the MFB Financial name. The acquisition  expands MFB Financial's  offering
of retail and small business financial services to eleven banking centers in the
St. Joseph and Elkhart county metropolitan area.

     Pursuant to General  Instruction  F to Form 8-K, the press  release  issued
August 6, 2004,  concerning the closing of the Acquisition is attached hereto as
Exhibit 99.1 and incorporated by reference herein.

     When used in this  Current  Report on Form 8-K,  the words or phrases  "pro
forma,"  "will  likely   result,"  "are  expected  to,"  "will   continue,"  "is
anticipated,"  "estimate,"  "project"  or similar  expressions  are  intended to
identify  "forward-looking   statements"  within  the  meaning  of  the  Private
Securities Litigation Reform Act of 1995. Such statements are subject to certain
risks and  uncertainties,  including,  among other things,  the possibility that
expected cost savings from the Acquisition  cannot be fully realized or realized
within the expected time frame,  the  possibility  that  revenues  following the
Acquisition  may be lower than expected,  changes in economic  conditions in the
Registrant's   market  area,   changes  in  policies  by  regulatory   agencies,
fluctuations in interest rates, and demand for loans in Registrant's market area
and  competition,  that could cause  actual  results to differ  materially  from
historical results and those presently anticipated or projected.  Readers should
not place undue  reliance on any such  forward-looking  statements,  which speak
only as of the date made. The factors listed above could affect the Registrant's
financial performance and could cause the Registrant's actual results for future
periods to differ  materially  from any opinions or  statements  expressed  with
respect to future periods in any current statements.

     The Registrant does not undertake and specifically  declines any obligation
to  publicly  release  the  result  of any  revisions  which  may be made to any
forward-looking  statements to reflect events or circumstances after the date of
such  statements or to reflect the occurrence of  anticipated  or  unanticipated
events.





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Item 7.  Financial Statements and Exhibits

     (a)  Financial Statements or Business Acquired.

          1. The financial  statements of Sobieski Bancorp,  Inc., including its
     consolidated  statements  of  financial  condition  as of June 30, 2003 and
     2002,  and related  consolidated  statements of  operations,  comprehensive
     loss,  stockholders' equity and cash flows for each of the two years in the
     period ended June 30, 2003, are attached hereto as Exhibit 99.2.

          2. The  unaudited  financial  statements  of Sobieski  Bancorp,  Inc.,
     including its condensed consolidated statement of financial condition as of
     March 31, 2004,  and related  consolidated  statements of income (loss) and
     comprehensive  income (loss) for the three and nine months ending March 31,
     2004 and 2003 and cash flows for the nine  months  ended March 31, 2004 and
     2003 are attached hereto as Exhibit 99.3.

     (b)  Pro Forma Financial Statements.

          The pro forma financial information required by this Item 7(b) will be
     filed by amendment to this Current Report on Form 8-K no later than 60 days
     after the date that this report is required to be filed with the Securities
     and Exchange Commission.

     (c)  Exhibits

          Exhibit 2 -- Purchase and  Assumption  Agreement  among MFB Financial,
     Sobieski   Bank,   and  Sobieski   Bancorp,   Inc.  dated  April  25,  2004
     (incorporated  by  reference  from Exhibit A to the  Registrant's  Form 8-K
     filed with the Commission on April 26, 2004).

          Exhibit  99.1 -- Press  release  dated August 6, 2004  announcing  the
     closing of the Acquisition.

          Exhibit 99.2 -- Audited Consolidated  Statement Financial Condition as
     of June 30, 2003 and 2002 and  Consolidated  Statements of  Operations  and
     Comprehensive  Loss,  Changes in Stockholders'  Equity,  and Cash Flows for
     each of the two years in the  period  ended  June 30,  2003,  for  Sobieski
     Bancorp, Inc.

          Exhibit  99.3  --  Unaudited  Condensed   Consolidated   Statement  of
     Financial  Condition  as  of  March  31,  2004,  and  related  consolidated
     statements of income (loss) and  comprehensive  income (loss) for the three
     and nine months  ending March 31, 2004 and 2003 and cash flows for the nine
     months ended March 31, 2004 and March 31, 2003, of Sobieski Bancorp, Inc.




                                   SIGNATURES

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




                                          /s/ Charles J. Viater
                                          --------------------------------------
                                          Charles J. Viater, President and CEO

Dated: August 12, 2004




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