EXHIBIT 23.7 Consent of Counsel I hereby consent to the use in the Joint Proxy Statement/Prospectus which forms a part of the Registration Statement on Form S-4 relating to the proposed merger of Heritage Financial Services, Inc. with and into a subsidiary of First Midwest Bancorp, Inc. of my name and firm name and the statements with respect to me, as appearing in the Joint Proxy Statement/Prospectus. /s/ Joel S. Corwin March 2, 1998 Joel S. Corwin Chicago, Illinois