Bochdalek hernia in adult is relatively uncommon. We experienced a surgical case of Bochdalek hernia in a 29 year old housewife. She was admitted via E-R due to left chest pain and nausea for 1 months. 5 days before admission, she had Cesarean section on private hospital. After delivery, nausea and exertional dyspnea were aggravated. On admission, chest PA showed herniated stomach, colon, small intestine on left thorax. She was diagnosed of diaphragmatic hernia and operated. Operative findings were as follows: 1. hypoplastic: lower lobe of left lung, 2. stomach, colon, small intestine, spleen were herniated, 3. the defect was located on posterolateral portion of diaphragm, measuring 10 x 8 cm in size. Herniated intestines were reduced and diaphragmatic defect was repaired as interrupted sutures with 2-0 Mersilene. Postoperative courses were uneventful and the patient was discharged on POD 10th.