The 1939–40 Duquesne Dukes men's basketball team represented Duquesne University during the 1939–40 NCAA men's basketball season. The Dukes were led by head coach Chick Davies and played their home games at Duquesne Gardens in Pittsburgh, Pennsylvania. Playing as an NCAA independent, Duquesne finished the regular season with a 17–1 record. The team advanced to the championship game of the National Invitation Tournament before losing to Colorado, then played in the NCAA tournament where they reached the only Final Four in program history. The Dukes finished with a 20–3 record overall with two of the losses coming to National champion Indiana.