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 Quarterly Report of Smithway Motor Xpress Corp. (the
"Company")  on Form 10-Q for the period ended June 30,  2002,  as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, William
G. Smith, Chief Executive 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 to the best of my knowledge:

     (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 results of operations of the
Company.


                                              /s/ William G. Smith
                                            ----------------------------
                                              William G. Smith
                                              Chief Executive Officer
                                              August 14, 2002