Autonomic hyperreflexia in spinal cord lesion is due to interruption of inhbitory im from higher centers. Especially, dramatic disturbance is seen in cord lesions above the fifth thoracic se and consist of hypertension, bradycardia and sweating. Sometimes marked hypert results in fatal cerebral hemorrhage or subarachnoid hemorrhage ao that the anesthesic gets used to its control and treatment. In current methods of control of hypertension, there are general anesthesia with halothane or enflurane, spinal anesthesia and ganglionic blockers. Ganglionic blockers, such as hexamethonium, drsmatically suppress marked arterial hypertension, also. We have experienced 3 cases of tetraplegic patients. Two cases given local anesthesia developed autonomic hyperreflexia but one case given general anesthesia did not have the hyperreflexia.