EXHIBIT 99.1


                  Certification of Periodic Financial Report
                      Pursuant to 18 U.S.C. Section 1350

For purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, the undersigned,
Lee R. Raymond, the chief executive officer of Exxon Mobil Corporation
(the "Company"), hereby certifies that, to his knowledge:

  (i)  the Quarterly Report on Form 10-Q of the Company for the
       quarter ended March 31, 2003, as filed with the Securities and
       Exchange Commission on the date hereof (the "Report") fully
       complies with the requirements of section 13(a) or 15(d) of the
       Securities Exchange Act of 1934; and

  (ii) the information contained in the Report fairly presents, in all
       material respects, the financial condition and results of
       operations of the Company.

Date: May 14, 2003

                                      /s/ Lee R. Raymond
                                      _______________________________
                                      Lee R. Raymond
                                      Chief Executive Officer




A signed original of this written statement required by Section 906
has been provided to Exxon Mobil Corporation and will be retained by
Exxon Mobil Corporation and furnished to the Securities and Exchange
Commission or its staff upon request.



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