

                                                             EXHIBIT 23-b


                        CONSENT OF INDEPENDENT AUDITORS


We consent to the reference to our firm under the caption "Experts" in
Amendment No. 1 to the Registration Statement on Form S-3 (No. 333-27919) for
the registration of $7,000,000,000 of debt securities, warrants, preferred
stock, purchase contracts and units and in the related Prospectus of Morgan
Stanley, Dean Witter, Discover & Co. for $7,000,000,000 of the same securities
and to the incorporation by reference therein of our reports with respect to
the consolidated financial statements and financial statement schedule of
Morgan Stanley Group Inc. dated January 7, 1997 included and incorporated by
reference in its Annual Report on Form 10-K for the fiscal year ended November
30, 1996 and dated May 27, 1997 included in the Current Report on Form 8-K of
Morgan Stanley, Dean Witter, Discover & Co. dated May 31, 1997, filed with the
Securities and Exchange Commission.

Ernst & Young LLP


New York, New York
June 2, 1997
