Two cases of acute jejunal diverticulitis are presented and confronted to data found in the literature. Acquired jejunal diverticulosis is a rare disease; its complications occur in a small percentage of cases. Chronic complications (malabsorption, megaloblastic anemia) should be treated medically. Acute complications (diverticulitis, perforation, haemorrhage, obstruction) require an emergency operation. Preoperative diagnosis is rarely made. Radiological or peroperative discovering of asymptomatic jejunal diverticula does not justify surgical treatment.