The anesthetic management of a patient with pheochromoctoma in pregnancy is presented. Preoperative phenoxybenzamine therapy and careful intraoperative monitoring preduced successful cesarean section and tumor reseetion in this patient. Problems that occurred during mamagement of this patient are hypoxemia(R/0 pulmonary edema) and cardiovascular flucctuation according to the operative procedure. Hypoxemia oceurred possibly due to large amount of crystalloid infusion in a short time and was solved with applying positive end expiratory pressure and using diuretics. Blood pressure was controlled effectively with sodium nitroprusside or phenylephrine infusion according to the operative procedure. Preoperative pregnancy induced liver disease in this patient was recovered after delivery.