Seligman Common Stock Fund (SBCSX) N-CSR Certified annual shareholder report (management investment company)

EXHIBIT 12(b)

RULE 30a-2(b) CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Seligman Common Stock Fund, Inc. (the registrant), do hereby certify, to such officer’s knowledge, that:

(1) The annual report on Form N-CSR of the registrant for the year ended December 31, 2007 (the “Form N-CSR”) 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 Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the registrant.

By:

/S/ BRIAN T. ZINO

Brian T. Zino

Chief Executive Officer

Date: March 7, 2008

By:

/S/ LAWRENCE P. VOGEL

Lawrence P. Vogel

Chief Financial Officer

Date: March 7, 2008