6-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 Under
the Securities Exchange Act of 1934

For the month of December, 2009

Cameco Corporation

(Commission file No. 1-14228)

2121-11th Street West
Saskatoon, Saskatchewan, Canada S7M 1J3
(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F o                 Form 40-F þ

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes o                 No þ

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):

Exhibit Index

Exhibit No.	Description	Page No.
1.	Press Release dated December 18, 2009		3

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: December 21, 2009	Cameco Corporation
	By:	“Gary M. S. Chad”
		Gary M.S. Chad
		Senior Vice-President, Governance, Law and Corporate Secretary

EX-1

Exhibit 1

TSX: CCO
NYSE: CCJ

website: cameco.com
currency: Cdn (unless noted)

2121 — 11^th Street West, Saskatoon, Saskatchewan, S7M 1J3 Canada
Tel: (306) 956-6200 Fax: (306) 956-6201

Cameco Fuel Manufacturing Workers Accept Contract Offer

Saskatoon, Saskatchewan, Canada, December 18, 2009 . . . . . . . . . . . .

Cameco Corporation (TSX: CCO; NYSE: CCJ) is pleased to announce that the 137 unionized employees at Cameco Fuel Manufacturing Inc. (CFM) in Ontario have agreed to a new collective agreement.

The employees, represented by the United Steelworkers Local 14193, voted today in favour of a three-year contract that includes a 5% wage increase over the term of the agreement. The workers began a legal strike on September 5, 2009.

The last collective agreement between CFM and its unionized employees expired June 1, 2009. Total workforce at CFM, including managers and non-unionized employees, is about 370.

CFM is part of Cameco’s fuel services division. It is one of two companies in Canada that manufacture fuel bundles for Candu nuclear reactors. It also makes various components for nuclear reactors.

Cameco, with its head office in Saskatoon, Saskatchewan, is one of the world’s largest uranium producers. The company’s uranium products are used to generate electricity in nuclear energy plants around the world, providing one of the cleanest sources of energy available today. Cameco’s shares trade on the Toronto and New York stock exchanges.

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Investor inquiries:	Rachelle Girard	(306) 956-6403
Media inquiries:	Lyle Krahn	(306) 956-6316