The authors retrospectively analyzed surgical outcomes in patients with an intracerebral hemorrhage (ICH) due to a ruptured middle cerebral artery aneurysm. A total of 47 patients with ICH who underwent early aneurysm surgery and hematoma evacuation within 24 hours following onset were studied. The types of ICH were classified into three groups by computerized tomography findings: 1) temporal ICH; 2) intrasylvian hematoma; and 3) ICH with diffuse subarachnoid hemorrhage (SAH). Overall, 25 patients (54%) had a favorable outcome and 18 (38%) died. Prognostic factors that predicted a favorable outcome included age less than 60 years, temporal ICH, World Federation of Neurological Surgeons Grade II or III, absence of a surgical complication, and a hematoma volume of less than 25 ml. In the patients with temporal ICH, eight of nine patients had a good recovery, and no patient developed a surgical complication or a delayed ischemic deficit. The most important predictive factor for a favorable outcome in patients with an intrasylvian hematoma was that they underwent early surgery (within 6 hours after symptom onset). In patients with a temporal ICH or intrasylvian hematoma, the initial neurological examination did not accurately predict outcome. By contrast, in the patients with ICH and diffuse SAH, those who developed an ICH with a volume of 25 ml or greater had a poor prognosis. These results suggest that aggressive surgical treatment should be initiated in patients with a temporal ICH or an intrasylvian hematoma, regardless of neurological findings on admission. In patients with an ICH and diffuse SAH, careful review of surgical indications is required.