A duodenal lesion due to blunt abdominal trauma is an infrequent eventi which makes important diagnostic and therapeutic problems. The preoperative diagnosis is not always easy, especially with retroperitoneal lesion or in injured patients. A plain abdominal radiography or a duodenal radiography with soluble contrast medium helps to achieve a proper diagnosis. Prognosis strictly depends on time between injury and surgical procedures. We report two successfully treated lesions of fourth duodenal due to a blunt abdominal trauma.