During the last three years we employed a pteriono-basal approach to 26 aneurysms of anerior circulation. The approach consist of a pterional craniotomy removed in block with the orbitozygomatic complex, resection of the superolateral orbit and anterior clinoidectomy. Using this approach, multidireccional viewing is possible with minimal brain retraction. We recomend this approachfor most of anterior circulation aneurysm, especialy those situated in the paraclionid area.