Radilogic findings in 30 patients with intestinal tubeculosis and 10 patients with intestinal Behcet'sdiseases, who had been diagnosed at seoul National University Hospital during the recent 5 years, were analysedretrospectively to evaluate the radiologic differential diagnosis of the two diseases. Intestinal tuberculosisseverely involved the cecum, the ileocecal valve, the distal ileum and colons, but Behcet's disease mainlyinvolved th distal ileum and infrequently the ileocecal valve and the cecum. The ulcers in tuberculosis wereusually multiple small barium collected areas among psuedopolyps on the contrary, those in Behcet's disease weremultiple, discrete, well marginated, geographic, ring-like deep penetrating or collar-button shaped. Intestinaltuberculosis tended to involved long segments of intestines, with severer mucosal irregularity and deformity ofthe ileocecal valve and the ascending colon in comparison with Behcet's disease. Mesenteric and/or peritonealinvolvment were accompanied in 1/3 cases of intestinal tuberculosis,a nd active pulmonary tuberculosis or pleuraleffusion also in 1/3 cases of intestinal tuberculosis.