Indonesia competed at the 1956 Summer Olympics in Melbourne, Australia. 30 competitors, 28 men and 2 women, took part in 11 events in 6 sports.

The men's sabre was one of seven fencing events on the fencing at the 1956 Summer Olympics programme. It was the thirteenth appearance of the event. The competition was held on 5 December 1956. 35 fencers from 17 nations competed. Nations had been limited to three fencers each since 1928. The event was won by Rudolf Kárpáti, the seventh of nine straight Games in which a Hungarian would win the event. Jerzy Pawłowski of Poland took silver and Lev Kuznetsov of the Soviet Union took bronze, the first medals in the event for each nation and the first time since 1924 that any nation other than Hungary and Italy earned a medal in the men's sabre.