Crohn's disease is a rare inflammatory bowel disease requiring a differential diagnosis with intestinal tuberculosis in Korea. There have been several problems in the diagnosis of Crohn's disease due to the much higher incidcnce of intestinal tuberculosis and the clinical similarities between the two diseases. Therefore, in many cases, treatment involveed anti-Tb drugs based upon empirical diagnosis, This study presents a case of Crohn's disease treated with anti-Tb drugs for about 9 months after intestinal tuberculosis was misdiagnosed. (Korean J Gastrointest Endosc 18, 945-950, 1998)