A 57-year old woman suffering from subarachnoid hemorrhage from a large internal carotid artery (ICA) aneurysm with a broad neck defined by computed tomography (CT) followed by three dimensional CT angiography in the local hospital, who was emergency transferred to our institute. Neurological status on admission was grade I on the H&H scale. This patient had had a past history of subarachnoid hemorrhage 14 years previously, undergoing surgery for a basilar artery ruptured aneurysm arising from the superior cerebellar artery (BA-SCA aneurysm) in other hospital. During the clipping surgery, the right internal carotid artery was injured, but fortunately it was repaired by further clipping. She and her family were Jehovahs Witness, rejecting the blood transfusion during the operation on grounds of religion.