Exhibit 12(b)

CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

          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 the TIAA-CREF Institutional Mutual Funds does hereby certify, to such officer’s knowledge, that:

The semi-annual report on Form N-CSR of the TIAA-CREF Institutional Mutual Funds (the “Funds”) for the six months ended March 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 information contained in the Form N-CSR fairly presents, in all material respects, the financial condition and results of operations of the Funds.

Dated: May 24, 2007	By:	/s/ Scott C. Evans
		Scott C. Evans
		Principal Executive Officer and President
		(principal executive officer)
Dated: May 24, 2007	By:	/s/ Philip G. Goff
		Phillip G. Goff
		Principal Accounting Officer, Principal Financial
		Officer and Treasurer
		(principal financial officer)