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

                                    FORM 8-K

                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

         Date of Report (date of earliest event reported): June 22, 2005

                        MainSource Financial Group, Inc.
             (Exact name of registrant as specified in its charter)

- --------------------------------  -------------------- ----------------------
           Indiana                      0-12422              35-1562245
- --------------------------------  -------------------- ----------------------
- --------------------------------  -------------------- ----------------------
 State or Other Jurisdiction of    Commission File No.     I.R.S. Employer
 Incorporation or Organization                          Identification Number
- --------------------------------  -------------------- ----------------------

                               201 North Broadway
                            Greensburg, Indiana 47240
                    (Address of principal executive offices)

                                 (812) 663-0157
                             (Registrant's Telephone
                                     Number,
                              Including Area Code)

                                       N/A
          (Former Name or Former Address, if Changed Since Last Report)

     Check the  appropriate  box below if the Form 8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

     |_| Written  communications  pursuant to Rule 425 under the  Securities Act
(17 CFR 230.425
     |_| Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17
CFR 240.14a-12)
     |_|  Pre-commencement  communications  pursuant to Rule 14d-2(b)  under the
Exchange Act (17 CFR 240.14d-2(b))
     |_|  Pre-commencement  communications  pursuant to Rule 13e-4(c)  under the
Exchange Act (17 CFR 240.13e-4(c))



Item 7.01.    Regulation FD Disclosure

     Attached hereto as Exhibit 99.1 and incorporated herein by reference is the
text of the  Company's  press  release  issued on June 22, 2005,  regarding  the
election of directors at the Company's 2005 annual meeting of shareholders.

Item 9.01.    Financial Statements and Exhibits

(c)   Exhibits

Exhibit No.   Description
- -----------   -----------
99.1          MainSource Financial Group, Inc.'s press release
              dated June 22, 2005.


                                    Signature

     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, thereunto duly authorized.

                                      MAINSOURCE FINANCIAL GROUP, INC.

Date:    June 22, 2005                By:  /s/ James L. Saner, Sr.
                                      --------------------------------
                                      James L. Saner, Sr.
                                      President and Chief Executive Officer