In evaluating the esophago-gastric junction, many difficulties are well known in a single contrast study, andit may often be resolved with double contrast technique. By double contrast technique, the special en face viewfor the esophago-gastric junction was obtained in 298 cases at Inje Medical College Paik Hospital from Jan. 1981 to June 1981. Five basic patterns were recognized and classifed from type I to V. Their incidences were obtained.-type I ; 18%, type II; 50%, type III; 23% type IV ; 7%, type V; 2%. The most common position of patients is left lateral, and zero degree is the most common at elevation of fluoroscopic table. Type III is the most common typeof the esophage-gastric junction in inspiration, and type I expiration. Any significant deviations from thesenormal geometry of the esophago-gastric junction as displayed by double contrast study, indicate an abnormality.More special attentions are required to evaluate a minute pathologic condition of the esophago-gastric junction.