Colonic Diverticulosis is once thought to be a rare disease in Korea compared with western countries but the incidence has been increasing with passage of time. Authors reviewed 151 cases of colon study with new double contrast method performed from ovember 1986 to March 1987 at Paik Hospital Inje collge. The results were as follows: 1. The colonic diverticulosis was found in 39 cases out of 151 colon study (25.8%) 2 Colonic Diverticulosis were located at right and transvercolon in 54% and left and sigmoid colon in 18% 3. Increasing occurrence in younger age group predilection : 4th decade was observed.