Exhibit 32.2

Certification of Chief Financial Officer of

CIGNA Corporation pursuant to 18 U.S.C. Section 1350

I certify that, to the best of my knowledge and belief, the Annual Report on Form 10-K of CIGNA Corporation for the fiscal period ending December 31, 2007 (the “Report”):

(1) 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 Report fairly presents, in all material respects, the financial condition and results of operations of CIGNA Corporation.

/s/ Michael W. Bell

Michael W. Bell

Chief Financial Officer

February 28, 2008