Abdominal aortic aneurysm (AAA) is a common chronic degenerative disease of the abdominal aorta leading to progressive dilatation, thrombosis, rupture and distal embolization. It is defined as exceed 30 mm or 50% increase in the normal diameter of the vessel and it is an important cause of morbidity and mortality. We report an exceptional case of an isolated AAA rupture in a 56 years old male with a previously undiagnosed AAA. The AAA rupture appeared during abdominal examination in the emergency department. It could be incidentally but also we want to emphasise that phsical examination or manuplation of abdomen should be done carefully if there are suspicion of AAA.