Post-traumatic duodenal injuries constitute a relatively rare group among this type of lesions reported in the abdominal structures. In the vast majority of cases, a post-traumatic duodenal injury is accompanied by damage to other important organs. The surgical management of duodenum injuries poses a high risk of life-threatening complications with duodenal fistula among the most common. In some cases, the combination of basic and advanced surgical procedures and intensive conservative treatment is insufficient to treat the complication. The progress in endoscopic techniques and the application of modern instruments have allowed for the use of these procedures to manage gastrointestinal injuries of various aetiology. The aim of the study is to present an effective endoscopic occlusion of post-traumatic duodenal fistula.