Intracranial aneurysms focus very often in the polygonal of Willis. They appear at the site of carotid-posterior communicating artery with high rate. Headache usually appears in these lesions. Subarachnoid hemorrhage is an early complication. Cerebral angiography plays a very important part in the diagnosis of these lesions but enhanced CT-Scanner can reveal them easily. We used sugita clip in the treatment of this aneurysm and had a good result. This spring clip that remains international standards is applied in spreading around the world.