Post-traumatic intracranial aneurysms are rare entity, which can appear following even benign head injuries. Their clinical manifestations are various, from a typical SAH to an uncommon intracerebral hematoma. Medical history runs usually from a couple of days to several years. Two cases of intracranial aneurysm have been observed from 1995 to 1998. The first case presented as a cortical aneurysm in a cerebral contusion following a week of evolution. The second case presented as a cortical hematoma with a head trauma 10 years before. All patients were operated on with uneventful follow-up. Post-traumatic intracranial aneurysms can exhibit an increase in size or a spontaneous thrombosis. Diagnosis is made by angiography, which has to be repeated if treatment has to be delayed. Best results are obtained by exclusion of the lesion, if allowed by the patient's condition.