Thirteen cases of traumatic diaphragmatic injuries treated at the Dept. of Thoracic & Cardiovascular Surgery in Kyung-Hee University Hospital from Jan. 1973 to Dec. 1982, were reviewed in this study. 1. Of 13 cues, 11 were male and 2 were female, a ratio of 5.5:1. This ratio revealed high incidence in male patients. The age distribution was ranged from 2 to 59 years. 2. The causes of traumatic diaphragmatic injuries; 6 were traffic accidents, 4 were stab wounds, 1 was falling down, 1 was gun shot wound and 1 was kick. 3. Operation were performed in 11 patients. No operation was done in 2 patients. 4. There were 100% of other associated injuries, the most frequent was having hemothorax. 5. 2 cases of death occurred in not operated patients. One was intracranial hematoma, and the other was hypertensive encephalopathy. [KTCS 1983;2:255-259]