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 Annual Report on Form 10-K of Rock-Tenn Company
(the "CORPORATION"), for the quarter ended September 30, 2005, as filed with the
Securities and Exchange Commission on the date hereof (the "REPORT"), the
undersigned, James A. Rubright, Chairman of the Board and Chief Executive
Officer of the Corporation, and Steven C. Voorhees, Executive Vice President and
Chief Financial Officer of the Corporation, each 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 results of operations of the
Corporation.


/s/ JAMES A. RUBRIGHT
- ----------------------------------------------------
James A. Rubright
Chairman of the Board and Chief Executive Officer
December 16, 2005


/s/   STEVEN C. VOORHEES
- ----------------------------------------------------
Steven C. Voorhees
Executive Vice President and Chief Financial Officer
December 16, 2005

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to Rock-Tenn Company and will be
retained by Rock-Tenn Company and furnished to the Securities and Exchange
Commission or its staff upon request.