There is collected cases report of esophagus diverticulum treated at the dept. of Thoracic & Cariovascular surgery of Pusan National University Hospital during the past 13 years from 1980 to 1992. The total number were 6 cases. In consideration of their sites, the cervical esophageal diverticulum one, the mid-thoracic diverticulum were five. And their pathogenetic analysis revealed 5 in traction type, and 1 in pulsion type. The investigation and analysis have been done in comparision with current concept of esophageal diverticulum.