Gastric hamartomatous inverted polyp is rare and also difficult to diagnose by forceps biopsy due to its submucosal location. We present three cases of gastric hamartomatous inverted polyps which had similar features and were diagnosed by endoscopy. All three cases were pedunculated lesions. One of the lesions had a size of 35mm─which was too large for the endoscopic snare─so was clipped at the base and resected at the peripheral side of the clip with a needle knife. Lesions in the other two cases were 8mm and 15 mm in size, and were resectable by snare. The surfaces of these lesions appeared to be normal mucosa with some slight depressions. Microscopic findings of the resected specimens showed inverted growth of mucosa and muscularis mucosa into the submucosal layer. These pathological features were compatible with the depressions that had been observed by endoscopy, caused by inverted growth into the submucosal layer.
