Foreign body ingestion is common in children. About 80% of ingested foreign bodies spontaneously pass through gastrointestinal tract. The management of an ingested magnet depends on its size, the same as for other foreign bodies. However, it has been reported that magnetic foreign body ingestion can lead to gastrointestinal fistula. We report here on the case of a 13-month-old boy who ingested two magnet bars that attracted to each other, and they were holding the gastric mucosa. A simple abdomen X-ray revealed that the location of two magnet bars was not changed according to the patient's positional change. The magnet bars were removed with an alligator forcep under gastroduodenal endoscopy. (Korean J Gastrointest Endosc 2006;32:275277)