We observed a rare complication of gall stones revealed by a paroxysmal digestive haemorrhage. Ulceration of the cystic artery occurred due to a stone trapped in the neck associated with a cholecystoduodenal fistula. This is an exceptional cause of major digestive tract haemorrhage. Treatment is undertaken with that of the gall stone. Most often haemorrhages originating in the bile tract are occult.