Stercoral ulcer is the ulcerated colonic mucosa due to the pressure effects of hard, scybalous feces. It is a rare clinical entity that usually occurs in the elderly, or the bedridden patients with chronic constipation, and usually located in the rectosigmoid area. If stercoral ulcer is presented with fatal complications such as massive hemorrhage or perforation, emergent operation is needed. There has been very few reports of stercoral ulcer found in the proximal colon. We experienced an unusual case of stercoral ulcer in the proximal colon in a middle-aged woman who had not suffered any organic disease, and she recovered completely after medical conservative treatment only, so we report this case with a review of the literature.