PRUDENTIAL UNIT TRUSTS INSURED MULTISTATE TAX EXEMPT SER 17, 497J, 1994-02-04

PRUDENTIAL UNIT TRUSTS INSURED MULTISTATE TAX EXEMPT SER 17
497J, 1994-02-04

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                              Rule 497(j)
                              Registration No. 33-7403
                              Registration No. 33-6344 


Pursuant to Rule 497(j) promulgated under the Securities Act of
1933, the Registrant, Prudential Unit Trusts, Insured Tax-Exempt
Series 20 and Insured Multistate Tax-Exempt Series 17 hereby
certifies as follows:

1)   the form of prospectus that would have been filed under
paragraph (b) of Rule 497 does not differ from that contained in
the most recent amendment to the registration statement, and

2)   the text of the said amendment to the registration statement
has been filed electronically.

                         PRUDENTIAL UNIT TRUSTS, 
                         Insured Tax-Exempt Series 20
                         Insured Multistate Tax-Exempt Series 17


                         By: Prudential Securities Incorporated
                                  (Depositor)


                             Richard R. Hoffmann
                             Richard R. Hoffmann
                             Authorized Signatory