Athletic director Dan Coonan announced the move Friday. Previously, Santa Clara extended Keating's contract in July 2011 through the 2014-15 season.
The Broncos are coming off a 26-win season in which they won the CBI title, after capturing the CIT tournament in 2011.
Keating is beginning his seventh season coaching the Broncos after working as an assistant at UCLA.
Keating has a 100-102 record at the school. During his tenure, all 17 seniors in the program who completed their eligibility went on to graduate.