 The purpose of this study is to clarify whether resecting pylorus-ring decreases delayed gastric emptying after pancreaticoduodenectomy and improves postoperative quality of lifeQOLcompared with preserving pylorus-ring. Delayed gastric emptying after pancreaticoduodenectomy are important to affect the postoperative course and QOL. However, there is no report that demonstrates the postoperative course between resecting pylorus-ring and preserving pylorus-ring. We conducted a prospective randomized trial on 130 patients who underwent pancreaticoduodenectomy comparing resecting pylorus-ring and preserving pylorus-ring. 