Tuberculous involvement of the tracheobronchial tree usually coexists with active pulmonary parenchymal or intrathoracic lymph node infection and very rarely has veen showed normal chest roentgenogram. This paper described 30 cases of endobronchial tuberculosis confirmed by bronchoscopy and biopsy in correlation to broncbographic finding on the patients from jan 1983 to Nov 1986 in Department of Radiology National Medical Center. The results were as follows; 1. Sex distribution of endobronchial tuberculosis showed 8 cases (26.7%) in male 22 cases (73.3%) in female and the higheset incidence in the third decade. 2. The radiologic findings of initial plain chest showed lobar or segmental collapse 16 cases (53.3%) minimal pulmonary tuberculosis 7 cases (23.3%) moderately advanced pulmonary tuberculosis 4 cases (13,3%) far advanced pulmonary tuberculosis 2 cases (6.7%) and normal finding 1 case (3.3%) 3. 25 cases of 28 bronchogram showed bronchial obstruction The left side was affected slightly more than the right (14:11) 4. The obstruction site of bronchus showed complete obstruction in11 cases among them sharp cut off in 2 rat tail narrowing in 1 symmetrical V-shaped narrowing in 8 and incomplete obstruction in 14 cases among them thumbprinting indentation in 2 circumferential symmetrical narrowing in 12. 5. 10 cases of 25 obstruction showed an associated bronchiectatic change of distal or adjacent to the lesion sote among them tubular in 3 saccular in 2 cystic in 5 cases