Xaver Affentranger (born 1 December 1897, date of death unknown) was a Swiss cross-country skier, Nordic combined skier, and ski jumper who competed in the 1920s.
At the 1924 Winter Olympics he finished 17th in the Nordic combined event, 22nd in the 18 km cross-country competition, and 24th in the ski jumping event.
He won a bronze medal in the Nordic combined at the 1925 FIS Nordic World Ski Championships in Johannisbad.