An omental infarctions is an uncommon cause of an acute abdomen and a rare entity in children. The etiology is still unclear and the symptoms mimic acute appendicitis. We recently encountered a case of a 10-year-old boy who had a previous surgical history of a manual reduction for intussusception. He complained of abdominal pain and right upper quadrant tenderness without fever or anorexia. An abdominal ultrasonography suggested an omental infarction and computed tomography confirmed the diagnosis. Conservative management was adopted with a rapid and uneventful recovery. Non-operative treatment is a safe and effective treatment of choice for omental infarction.