Diabetic gastroparesis is a common gastrointestinal complication which develops in about 20-30% of patients with longstanding diabetes mellitus. Recent studies have shown that erythromycin stimulates gastrointestinal motor activity by binding on motilin receptors of gastrointestinal smooth muscles and that it improves gastric emptying in patients with diabetic gastroparesis. In this respect, we present a 35-year-old patient with diabetic gastroparesis, complicated with a gastric bezoar, who was successfully treated with endoscopic bezoar fragmentation and oral erythromycin for 3 weeks. (Korean J Gastrointest Endosc 18: 381-386, 1998)