The 2017–18 Arizona Wildcats men's basketball team represented the University of Arizona during the 2017–18 NCAA Division I men's basketball season. The team was led by ninth-year head coach Sean Miller, and played their home games at McKale Center in Tucson, Arizona as members in the Pac-12 Conference. They finished the season 27–8, 14–4 in Pac-12 play to win the regular season championship. They defeated Colorado, UCLA, and USC to win the Pac-12 tournament. As a result, they received the conference's automatic bid to the NCAA tournament where, as a No. 4 seed, they were upset in the First Round by No. 13 seed Buffalo.