We evaluated forty cases of traumatic diaphragmatic ruptures that we have experienced from Mar. 1976 to Mar. 1992. Thirty patients were male and 10 were female[M:F=3:1]. The age distribution was ranged from 2 to 76 years with the mean age of 35 years. The traumatic diaphragmatic ruptures were due to blunt trauma in 26 cases[traffic accident 20, fall down 4, others 2] and penetrating trauma in 14 cases[stab wound 13, gun shot 1]. In the blunt trauma, 21 of 26 cases were diagnosed within 24 hours after injury and all cases except one in penetrating trauma were diagnosed within 24 hours. In the blunt trauma, the rupture site was located in the left in 20 cases and in the right in 6 cases. In the penetrating trauma, the rupture site was located in the left in 10 cases and in the right in 4 cases. The repair of 40 cases were performed with thoracic approach in 19 cases, thoracoabdominal approach in 17 cases and abdominal approach in 4 cases. The postoperative mortality was 7.5 %[3/40]. The causes of death were septic shock[1], acute renal failure[1] and hypovolemic shock[1].