MFS INSTITUTIONAL TRUST, 497J, 1997-11-03

MFS INSTITUTIONAL TRUST
497J, 1997-11-03

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                             MFS INSTITUTIONAL TRUST
               500 Boylston Street Boston Massachusetts 02116-3741
                                 617 954 5000




                                    November 3, 1997



VIA EDGAR

Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, NW
Washington, DC  20549

         Re:  MFS Institutional Trust (the "Trust") (File Nos. 33-37615 and
              811-6174)  on Behalf of MFS  Institutional  Global  Fixed  Income
              Fund, MFS  Institutional  Mid Cap Growth Fund, MFS  Institutional
              Emerging Equities Fund, MFS  Institutional  Emerging Markets Debt
              Fund,   MFS   Institutional   International   Equity  Fund,   MFS
              Institutional  Core  Fixed  Income  Fund  and  MFS  Institutional
              Research Fund

Ladies and Gentlemen:

         Pursuant to Rule 497(j) under the  Securities  Act of 1933, as amended,
please accept this letter as certification  that the Prospectus and Statement of
Additional  Information  for the Trust do not  differ  from those  contained  in
Post-Effective  Amendment No. 15 (the  "Amendment") to the Trust's  Registration
Statement on Form N-1A.  The Amendment was filed  electronically  on October 28,
1997.

         Please call the  undersigned  or Brett A. Miguel at (617)  954-5873 or
(800) 343-2829 with any questions you may have.

                                    Very truly yours,


                                    JAMES R. BORDEWICK, JR.
                                    James R. Bordewick, Jr.
                                    Assistant Secretary

JRB/bjn