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: May 7, 2004

                            MICHAEL BAKER CORPORATION
             (Exact name of registrant as specified in its charter)

        Pennsylvania                     1-6627                25-0927646
       (State or Other                (Commission             (IRS Employer
Jurisdiction of incorporation)        File Number)        Identification Number)

                              Airside Business Park
                                100 Airside Drive
                        Moon Township, Pennsylvania 15108
                    (Address of Principal Executive Offices)

                                 (412) 269-6300
              (Registrant's Telephone Number, including Area Code)



Item 7. Financial Statements and Exhibits.

(c)   Exhibits

The following exhibit is filed with this report on Form 8-K:

Exhibit No.          Description
- -----------          -----------

99.1                 Press release issued May 7, 2004

Item 9. Disclosure of Results of Operations and Financial Condition.

The information contained in this Item 9 is being furnished pursuant to Item 12
of Form 8-K, "Results of Operations and Financial Condition." This information
shall not be deemed "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), or incorporated by
reference in any filing under the Securities Act of 1933, as amended, or the
Exchange Act, except as shall be expressly set forth by specific reference in
such a filing.

On May 7, 2004, Michael Baker Corporation (the "Company") issued a press release
reporting the Company's financial results for the three-month period ended March
31, 2004. A copy of the press release is attached to this report as Exhibit 99.1
and incorporated herein by reference.

                                    SIGNATURE

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

                                                 MICHAEL BAKER CORPORATION

                                                 By: /s/ William P. Mooney
                                                    ----------------------------
                                                    Executive Vice President and
                                                    Chief Financial Officer

Date: May 7, 2004



                                  EXHIBIT INDEX

Number     Description                                          Method of Filing
- ------     -----------                                          ----------------

99.1       Press release dated May 7, 2004                      Filed herewith