A 6-year-old girl presented with a very large aneurysm of the distal branch of middle cerebral artery( angular artery). There was a previous history of mild traumatic brain injury. The presentation happened more than 5 weeks after the trauma with an  atypical visual complaint. She was successfully treated by embolization and occlusion of the parental vessel. Recognizing pos traumatic aneurysm is a challenging in young child and must be remembered in patients with a recent traumatic event. Endovascular treatment is a good option when the occlusion of the artery is possible in the presence of a good collateral circulation.   Key-words: Dissecting aneurysm; middle cerebral artery; endovascular; pediatric aneurysms