Eleven cases of traumatic diaphragmatic hernia treated at the department of thoracic and cardiovascular surgery, for the period of seven years up to February 1975, from the base of this report. 1. Peak incidence was found in the age group of one to four years and thirty to forty years, four cases in each group respectively, occupying 63.6% of all cases. 2. In all the lesions the left diaphragm was affected and the herniated organs were in order of frequency the small bowel, the large intestine, the stomach, and the spleen. 3. The methods of the adapted treatment were laparatomy in five, thoracoabdominal approach in four, and thoracotomy in two cases. 4. The mortality rate was low, only one out of eleven died It seems that the immediate appropriate treatment can bring forth the excellent outcome.[KTCS 1975;1:45-50]