Exhibit 32(a)

                        CERTIFICATION OF PERIODIC REPORT
                         RULE 1350 CERTIFICATIONS OF CEO
           Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
                       As Codefied at 18 U.S.C Section 350

I, the undersigned J. Kenneth Glass, Chairman of the Board, President and Chief
Executive Officer of First Tennessee National Corporation ("Corporation"),
hereby certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18
U.S.C. Section 1350, as follows:

     1.   The Corporation's Annual Report on Form 10-K for the year ended
          December 31, 2003 (the "Report") fully complies with the requirements
          of Section 13(a) or 15(d) of the Securities Exchange Act of 1934.

     2.   The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Corporation.

Dated: March 10, 2004



/s/ J. Kenneth Glass
--------------------------------
J. Kenneth Glass
Chairman of the Board, President
Chief Executive Officer