<PAGE>
Rule 424(b)(2)
File No. 33-644
PRICING SUPPLEMENT NO. 50 DATED September 4, 1997
---- -------------------
(To Prospectus dated December 7, 1995 as supplemented
by Prospectus Supplement dated December 27, 1995)
MARSHALL & ILSLEY CORPORATION
Medium-Term Notes, Series D
Due from 9 months to 30 years from date of Issue
Fixed Rate Notes
-------------------
Trade Date: September 4, 1997 Issue Price: 99.800%
------------------ --------------
Original Issued Date: September 9, 1997 Principal Amount: $2,000,000.00
------------------ --------------
Interest Rate
Maturity Date: March 1, 1999 Per Annum: 6.110%
------------------ --------------
Redemption:
Check box opposite applicable paragraph.
[X] The Notes cannot be redeemed prior to maturity
[ ] The Notes may be redeemed prior to maturity
Terms of Redemption:
Additional Terms:
CUSIP - 57183HEU1
