Objectives: To evaluate mortality rate, causes and risk factors in CDH. Patients and methods: A retrospective research on children who were diagnosed with CDH at NHP from 2001-2012. Results: There were 438 children with CDH during the study periode. The mortality rate was 25,6 percent. 10,1 percent of those patients died before surgery. Post- operative mortality rate was 17,6 percent (post-operative endoscopic mortality rate accounted for 14,2 percent). Preoperative mortality rate was 45 times higher in children suferring from postnatal apnea than in children without apnea. Postoperative mortality rate was 23 times higher in patients with pulmonary arterial hypertention than those without pulmonary hypertentiori. Conclusions: Postoperative mortality rate was 17.6 percent. Mortality risk factor of CDH were: low birth weight (2500g), postnatal apnea, and pulmonary arterial hypertention.