Gastroesophageal reflux is generally recognized as the prephnderant fator inthe causation of the most cases of esophagitis and the accompanying symptom of phyrosis. It has been known that free gastroesophageal reflux is infrequent phenoenon but we observed gastroesophageal reflux during U.G.I examination in 111 cases among 152 patients (73.7%) who had various gastrointestinal symptoms. Gastroesophageal reflux was most frequently induced in supine LAO position. The next frequent positions are erect position, RAO and supine position.