Montgomery, 65, has won 22 or more games in three of his four seasons at Cal since taking over in 2008 and claimed the Pac-10 regular season championship in 2010. The Bears went 24-10, 13-5 in conference play, this past season and made the NCAA Tournament behind Pac-12 Player of the Year guard Jorge Gutierrez.
"His tremendous achievements speak for themselves," Cal athletic director Sandy Barbour said of Montgomery. "Mike epitomizes the mission, vision and values of our department and I am excited he will continue to lead our men's basketball program for the next four seasons."
Terms of the extension were not immediately available.