Gastroesophageal reflux is generally recognized as the preponderant factor in the causation of the most casesof esophagitis and the accompanying symptom of pyrosis. It has been known that free gastroesophageal reflux isinfrequent phenomenon but we observed gastroesophageal reflux during U.G.I. examination in 111 cases among 152patients (73.7%) who had various gastrintestinal symptoms. Gastroesophageal reflux was most frequently induced insupine LAO position. The next frequent positions are erect position, RAO and supine position.