A 40-year-old man presented to the emergency department with periumbilical pain and fever. A computed tomographic scan confirmed multiple jejunal diverticulum with localized extraluminal air and panniculitis around it, and jejunal diverticulitis with localized perforation was suspected. His symptoms were mild, and extraluminal air was localized;therefore, he was advised bowel rest and administered only antibiotics. The patient's symptoms resolved without surgical treatment, and at the time of writing this report, there had been no recurrence. Small bowel diverticulitis is rare, and careful analysis of imaging studies is necessary for establishing a diagnosis. This was a rare case where small bowel diverticulitis was resolved without surgical treatment.