The combined spinal-epidural (CSE) technique for cesarean section was investigated by comparing between intrathecal hyperbaric and isobaric bupivaciane. Sixty patients, ASA I-II, undergoing for Cesarean section were randomly assigned to receive 0.5% hyperbaric bupivacaine (group II). Both groups received 2% lidocaine with adrenaline 1 : 400,000 via epidural space in the same does. Level and efficacy of blockage, satisfaction of patients, muscle relaxation and side effects were observed. The result showed both hyperbaric and isobaric bupivacaine were good for CSE for cesarean section and there was no statistically significant difference between the two groups.