Diverticulum is considered as a common lessin involving any gastrointestinal tract from the pharynx to the rectum. We reviewed 5806 cases of upper G-I series and 801 cases of double contrast barium enema during the period from Jan. 1978 to Dec. 1981 in the Department of Radiology, School of Medicine, Jeonbug National University Hospital to analyze diverticula of the entire gastrointestinal tract. The results were as follows : 1. Roentgen examination of 5806 esophagus, stomachs, duodenums and small bowels, and 801 colons during the past four years : diverticula of the esophagus, 60 cases(1.0%); diverticula of the stomach, 42 cases (0, 7%); diverticula of the duodenum, 358 cases (6.2%); diverticula of the small bowel, 20 cases(0.3%); diverticula of the colon, 26 cases(3.2%). The location of diverticula in order of frequency was duodenum, colon, esophagus, stomach and small bowel. 2. The most common site of diverticula of each gastrointestinal tract was as follows : diverticula of the esophagus, middle portion (84.7%); diverticula of the stomach, the cardia (59.5%); diverticula of the duodenum, the second portion (81.3%); diverticula of the small bowel, the jejunum (96.4%)-especially the colon, the right sided conon (80.8%)-the cecum and ascending colon (57.1%). 3. Diverticula may occur at any age. The majority of diverticula of the entire gastrointestinal tract were observed over 40 years of age. Especially in diverticula of the duodenum and colon, their frequency increase with age. 4. Duodenal diverticula were observed more frequently in women than in man but in diverticula of the esophagus, stomach, small bowel and colon, male was more frequency affected. 5. Mutiplicity of diverticula of the entire gastrointestinal tract was 16.2% of 506 cases. In diverticula of the esophagus, stomach, duodenum and small bowel, single lesion was more frequency found. On the other hand, the majority of diverticula of the colon were found as multiple lesion (69.2%).