We report a case of epidural anesthesia in a patient presenting for cesarean section with Moyamoya disease. Epidural anesthesia was performed using 0.5% bupivacaine and fentanyl 100 microgram. We used NIRS (near infrared spectroscopy) to monitor neurologic complication. A stable hemodynamic state was produced using left lateral uterine displacement, i.v. infusion of crystalloid solution and ephedrine. The patient had no neurological deficit and there was no significant intraoperative decrease in cerebral oxygenation measured by near infrared spectroscopy.