Endobronchial tuberculosis is the tuberculous affection of bronchial wall during the process of sloughing or parenchymal necrotic material through airway. When the lesion results in complete obstruction, it resembles the featrues of central type endobronchial tumor. On the other hand, in the cases of in-complete obstruction very minimal parenchymal change, not corresponding with clinical symptoms, delays the correct diagnosis. This is summary of 35 cases of endobronchial tuberculosis, diagnosed by bronchofiberscopy and biopsy of the lesion from 1982 to 1984 June in Yonsei University Medical Center. 1.35 patients included 9 children and 26 adultss. All children were less than 5 years old. In adults women accupied The majority and especially prevalent in 3rd decade. 2. The findings of plain chest showed lobar collapse and/or overiflation 8(88.9%) in children group, but lobar collapse 13 (50%) in adults group. 3. In 20 patients the bronchial lesion itself was evaluated by bronchotomogram or bronchogram. The incidence of right and left affection was same, the each side included 10 patients. But the most frequent affected site was left main bronchus (10) In right side 6 patients showed main lesion only on lobar and/or segmental bronchi. 4. The lesion site of bronchus showed complete obstruction in 12, among which symmetric V-shape obstruction in 8, abrupt amputation in 2 and nodular protruding mass in 2. In remaining 8 incomplete obstruction 2 showed diffuse irregular nodularity 3 smooth long concentric narrowing and 3 con-centric focal narrowing. 5. Proximal to the lesion, gradual and symmetric narrowing of bronchial lumen in fairly long distance was noted in 5, which correspond with typical bronchoscopic finding. The other 2 showed the extension of tuberculous lesion to the ipsilateral wall of distal trachea. 6. Distal to the lesion 12 patients showed patency of bronchial lumen, of which 6 with radiograpically complete obstruction of endobronchial lesion. This maintenace of luminal patency distal to the obstructing lesion seems to be a characteristics of endobronchial tuberculosis.