The 1940 Big Ten Conference football season was the 45th season of college football played by the member schools of the Big Ten Conference (also known as the Western Conference) and was a part of the 1940 college football season. The University of Chicago terminated its football program after the 1939 season, leaving only nine conference members fielding football teams. However, Chicago remained a member of the conference and participated in other sports, and the conference remained known generally as the Big Ten.