We report a case of duodenal liposarcoma. A 62-year-old man presented with an abdominal tumor. Abdominal CT scan and MRI showed a tumor in the wall of the duodenum. Pancreaticoduodenectomy was performed. The final pathological diagnosis was mixed-type liposarcoma. Twenty-one months after the 1st surgery, the patient presented with locoregional recurrence and tumor resection was performed. However, 12 months after the 2nd operation, the patient again presented with locoregional recurrence and further surgery is planned.