EXHIBIT 32.1

 Certification Required by Rule 13a - 14(b) of the Securities Exchange Act of
   1934 and Section 1350 of Chapter 63 of Title 18 of the United States Code

         In connection with the Annual Report of Greif, Inc. (the "Company") on
Form 10-K for the annual period ended October 31, 2003, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Michael
J. Gasser, the 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 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.

Date:  January 22, 2004                              /s/ Michael J. Gasser
       ----------------                              ---------------------------
                                                     Michael J. Gasser, Chairman
                                                     and Chief Executive Officer


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