"Spontaneous bladder rupture is a very rare condition. It is the term employed for all cases of rupture not associated with trauma, including diseases of the urinary bladder or urinary outflow obstruction. It usually presents as severe abdominal pain. But in some cases, because symptoms are insidious and often atypical among elderly patients, this condition is often undetected. We describe an unusual case of spontaneous bladder rupture due to giant bladder stone."