Despite of its rarity, eosinophilic gastroenteritis (EG) needs to be recognized by the clinician because this disease can masquerade as irritable bowel syndrome and it may be misdiagnosed in clinical practice. We report here on a female patient with gastric outlet obstruction that was due to EG, and we review the relevant literature for either an association or a causality of EG. (J Korean Surg Soc 2008;75:447-450)