The incidence of adult eosinophillic esophagitis has been on the increase greatly in recent years, but the disease has been rarely reported in Korea. Eosinophilic esophagitis is a chronic inflammatory disease causing dysphagia and food impaction. A round ring, longitudinal furrows and mucosal friability are the major findings seen by endoscopy. Eosionophilc esophagitis is confirmed by pathology when more than 20 eosinophils are found on microscopy with use of a high power field. We experienced three cases of eosinophilic esophagitis with complaints of dysphagia. (Korean J Gastrointest Endosc 2008;36:145-149)