Purpose : To evaluate the CT findings of histologically confirmed endobrnchial tuberculosis(EBTB) and toaccess their diagnostic value by comparing with the bronchoscopic findings. Materials and Method : We evaluatedretrospectively the CT findings of 25 patients(male : female=5 : 20) with EBTB, and classified them into 3 typesby their characteristic features, which are compared with the brochoscopic findings. The 3 types of CT featureswere as follows ; type 1 : central mass-like lesion with coarse calcific spots associated with atelectasis, type 2: caseous pneumonia with air-bronchogram associated with atelecatasis, type 3 : irregularly distorted and narrowedbronchovascular changes. Results : Comparing the characteristic CT findings with the bronchoscopic findings, theywere as follows ; type 1 showed completely occluded lumen by caseous or scar-like tissue with severely swollenmucosa, type 2 showed very thick tenacious mucous plug with anthracotic pigmentation of mucosa, type 3 showedchronic inflammatory change of mucosa with severely deviated or septated bronchial lumen by out-growing caseousgranulation tissue. A tracheal tuberculosis without parenchymal lesion was noted and the bronchoscopy showedcaseous materials along the tracheal lumen to the carinal level. Conclusion : The characteristic CT findings ofthe bronchial wall and the changes of the adjacent tissues are related to the tracheobronchial tuberculousinvolvement. CT is useful for diagnosis of the endobronchial tuberculosis.