EXHIBIT 32.3


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


In connection  with the Annual Report of Silgan Holdings Inc. (the "Company") on
Form  10-K for the  fiscal  year  ended  December  31,  2004 as  filed  with the
Securities and Exchange Commission on the date hereof (the "Annual Report"),  I,
Robert B. Lewis, Chief Financial 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 Annual 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 Annual Report fairly presents, in all
     material respects, the financial condition and results of operations of the
     Company.


/s/ Robert B. Lewis
- --------------------
Robert B. Lewis
Executive Vice President and Chief Financial Officer

March 7, 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.