CERTIFICATION PURSUANT TO RULE 30a-2(b) UNDER THE 1940 ACT AND SECTION 906 OF
                             THE SARBANES-OXLEY ACT

I, Jill McGruder, President of Touchstone Institutional Funds Trust (the
"Registrant"), certify that:

      1.    The Form N-CSR of the Registrant (the "Report") fully complies with
            the requirements of Section 13(a) or 15(d) of the Securities
            Exchange Act of 1934, as amended; and

      2.    The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Registrant.


Date: March 3, 2010                  /s/ Jill McGruder
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                                     Jill McGruder, President
                                     (principal executive officer)


I, Terrie Wiedenheft, Controller and Treasurer of Touchstone Institutional Funds
Trust (the "Registrant"), certify that:

      1.    The Form N-CSR of the Registrant (the "Report") fully complies with
            the requirements of Section 13(a) or 15(d) of the Securities
            Exchange Act of 1934, as amended; and

      2.    The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Registrant.


Date: March 2, 2010                  /s/ Terrie Wiedenheft
      --------------                 -------------------------------------------
                                     Terrie Wiedenheft, Controller and Treasurer
                                     (principal financial officer)