Filed Pursuant to Rule 424(b)(3)
Registration No. 333-85654
PROSPECTUS SUPPLEMENT NO. 17 TO PROSPECTUS DATED JUNE 21, 2002
of
CALPINE CORPORATION
Relating to
Resales by Selling Securityholders
of
4% Convertible Senior Notes
and Shares of Common Stock Issuable Upon Conversion of the Senior Notes
       This Prospectus Supplement supplements the Prospectus dated June 21, 2002, as supplemented to date (the “Prospectus”). This Prospectus Supplement should be read in conjunction with the Prospectus, which is to be delivered by selling securityholders to prospective purchasers along with this Prospectus Supplement. The information in the following table supercedes in part and supplements the information in the relevant section in the Prospectus. 

								Shares of	
								Common Stock	
		Aggregate Principal		Shares of		Shares of		Beneficially	
		Amount of Notes		Common		Common		Owned After	
		Beneficially Owned		Stock		Stock		Completion of	
Selling Holder		and Offered		Beneficially Owned		Offered		the Offering	
									
KBC Financial Products USA, Inc.	 	$	3,000,000	 	 	 	166,020	 	 	 	166,020	 	 	 	0	 	

Prospectus Supplement dated July 15, 2003