EX-99.906

                          Rule 30a-2(b) CERTIFICATIONS


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 Alger Institutional Funds, do hereby certify, to
such officer's knowledge, that:

     (1)  The semi-annual report on Form N-CSR of the Registrant for the period
          ended April 30, 2005 (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 Alger Institutional Funds.


Dated: June 18, 2007


/s/Dan C. Chung


Dan C. Chung
President
The Alger Institutional Funds

Dated: June 18, 2007


/s/ Michael D. Martins


Michael D. Martins
Treasurer
The Alger Institutional Funds

Dated: June 18, 2007


     This certification is being furnished solely pursuant to 18 U.S.C. ss. 1350
     and is not being filed as part of the Report or as a separate disclosure
     document.