Exhibit 32.2

                 CERTIFICATION BY THE CO-CHIEF EXECUTIVE OFFICER
                PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT


In connection with the Quarterly  Report of Silgan Holdings Inc. (the "Company")
on Form  10-Q  for the  period  ended  September  30,  2005 as  filed  with  the
Securities and Exchange Commission on the date hereof (the "Quarterly  Report"),
I, D.  Greg  Horrigan,  Co-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 Quarterly  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 Quarterly Report fairly presents,  in
     all material respects, the financial condition and results of operations of
     the Company.


/s/ D. Greg Horrigan
--------------------
D. Greg Horrigan
Co-Chairman of the Board and
Co-Chief Executive Officer

November 9, 2005


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