Exhibit 32.1


                            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  September 30, 2003, 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 CEO
                                --------------------------------------------
                                William G. Smith
                                Chief Executive Officer
                                November 13, 2003

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