A 48-year-old man was referred to our hospital because of anemia. Upper gastrointestinal endoscopy showed discolored depressive lesion like gastric cancer, 30mm in diameter, in the greater curvature of the upper gastric body. During the endoscopic examination, pulsative bleeding from the lesion was occurred and we performed clipping hemostasis. We diagnosed a gastric arteriovenous malformation by endoscopic ultrasonograph and angiography. A pylorus preserving-gastrectomy was performed and Pathohistological examination revealed arterio-venous connection in the submucosal layer of the gastric wall.