Exhibit 32.1

                  CERTIFICATION BY THE 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 March 31,  2007 as filed with the  Securities
and Exchange Commission on the date hereof (the "Quarterly Report"),  I, Anthony
J.  Allott,  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/ Anthony J. Allott
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Anthony J. Allott
President and
Chief Executive Officer

May 10, 2007


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.