In a 52-year-old man, there was a complete separation of the duodenum with avulsion of the papilla of Vater from the head of the pancreas due to blunt abdominal trauma. He was successfully treated by an anastomosis of the ampulla to the jejunum of a Roux-en Y limb, after removal of the entire duodenum and partial gastrectomy, followed by gastrojejunostomy of the Billroth II-type, instead of pancreaticoduodenectomy. The patient is well at 15 months after this surgery.