INSURED MUNICIPALS INCOME TRUST SERIES 178, 497J, 1998-12-30

INSURED MUNICIPALS INCOME TRUST SERIES 178
497J, 1998-12-30

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                                December 30, 1998
                                    
                                    
                                    
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549-1004

Attn:  Filing Desk - Stop 1-4
     
     Re:  Insured Municipals Income Trust, Series 178
          File No. 33-09533   CIK #0000804120

Ladies/Gentlemen:
     
         In accordance with the provisions of Rule 497(j) of Regulation C under
the Securities Act of 1933 (the "Securities Act") this letter serves to certify
that the most recent amendment to the subject Registration Statement on Form S-6
for the above captioned Trust does not differ from that which would have been
filed pursuant to Rule 497(b) of the Securities Act. The most recent amendment
to the Registration Statement was filed electronically with the commission on
December 24, 1998.

                                    Very truly yours,

                                    Van Kampen Funds Inc.