An 86-year-old woman with a history of hypertension and colonic diverticular bleeding (CDB) presented with severe hematochezia to a nearby medical institution. Contrast-enhanced CT identified extravasation in the sigmoid colon (Fig. 1). Emergency colonoscopy revealed an active diverticular hemorrhage in the sigmoid colon. Although an endoclip was placed on the responsible diverticulum, active bleeding persisted. She was then referred to the emergency department of our hospital.