Background and Aims: Intussusception is the one of the most common acute abdomen in children. Ultrasound is being increasingly used the diagnosis of intussuscption. Ultrasound was performed by gastroenterologists at our hospital but not available at night and holidays. The ultrasound training was conducted for pediatric emergency physician. We analyzed our experience to evaluate the validation of ultrasound performed by pediatric emergency physician for the diagnosis of intussusception at emergency department.