Small bowel diverticula are usually asymptomatic and rare. Digestive bleeding is a rare complication of jejunal diverticulum whose diagnosis and treatment are difficult. We report a rare case of hematochezia whose origin was a proximal jejunal diverticulum and not determined by endoscopic investigations. Bowel resection with primary anastomosis was the chosen surgical procedure. There was no complication until discharge nor was any recurrent bleeding or functional disorder of the bowel reported during follow-up. The clinical presentation, the different value of diagnostic tools and the therapy are discussed.