Recently colonic diverticulosis in Korea is one of rapidly increased disease in its incidence but it is different from that of western countries in the incidence or developing pattern. So authors reviewed 1921 cases of double contrast study performed during 20 months from Jan 1st 1987 to Aug 30th 1988 at the Department of Radiology Yeungnam University Hospital to analyze current disease pattern of the colonic diverticulosis. The results were as follows. 1. The incidence was 11.8%(226/1921) and predominant in male.2. The mean age of patients was 48.41 years and older in female but their incidence was not increased with advancing age over 6th decade. 3. The mean number of diverticula was 7.6 and higher in cases involving several anatomic location than limited to location. 4. Diverticulosis more commonly involved several anatomic location than one location. 5. Left sided colonic diverticulosis was found in relatively older age group and most frequen-tly involved descending colon than sigmoid colon most commonly seen in western people. 6. Recently the incidence of colonic diverticulosis is increasing in both the right and left colon which is thought to be deu to various factors and partly to the routine use of double contrast study of the colon.