EXHIBIT 99.3

                                 UNI-MARTS INC.

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. Section 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Annual Report of Uni-Marts Inc. (the "Company") on Form
10-K for the period ending September 30, 2002 as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), I, N. Gregory Petrick,
Executive Vice President and Chief Financial 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:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of
the Securities Exchange Act of 1934; and

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

                                            /s/ N. Gregory Petrick
Date:   December 20, 2002                   ____________________________________
                                            N. Gregory Petrick
                                            Executive Vice President and
                                            Chief Financial Officer