In contrast to diverticulosis of the large bowel, diverticular disease of the small bowel is rare. This small bowel disease is predominantly localized to the duodenum. Jejunal and ileal diverticula are rare and occur in the majority of patients without clinical impact. Less than 10% of patients develop serious complications, including obstruction, hemorrhage, perforation and penetration. Here, we present 4 patients with jejunal diverticulitis. Three of these patients experienced perforation.