CERTIFICATIONS PURSUANT TO SECTION 906
EX-99.906CERT

                                  CERTIFICATION

R. JAY GERKEN, Chief Executive Officer, and KAPREL OSZOLAK, Chief Financial
Officer of The Travelers Series Trust - Zero Coupon Bond Fund Portfolio Series
2005 (the "Registrant"), each certify to the best of his knowledge that:

      1. The Registrant's periodic report on Form N-CSR for the period ended
December 31, 2004 (the "Form N-CSR") fully complies with the requirements of
section 15(d) of the Securities Exchange Act of 1934, as amended; and

      2. The information contained in the Form N-CSR fairly presents, in all
material respects, the financial condition and results of operations of the
Registrant.

Chief Executive Officer                     Chief Financial Officer
The Travelers Series Trust -                The Travelers Series Trust -
Zero Coupon Bond Fund Portfolio             Zero Coupon Bond Fund Portfolio
Series 2005                                 Series 2005

/s/ R. Jay Gerken                           /s/ Kaprel Ozsolak
- ---------------------------                 ------------------------------------
R. Jay Gerken                               Kaprel Ozsolak
Date: March 9, 2005                         Date:  March 9, 2005

This certification is being furnished to the Securities and Exchange Commission
solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the
Form N-CSR with the Commission.

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