Purpose : The purpose of this study wass to evaluate the bronchial change of the endobronchial tuberculosis onCT scan during and after medical treatment to guide. Materials and Methods : We prospectively analyzed thebronchial changes on CT scans of 14 endobronchial tuberculous lesions in 11 patients. The diagnosis of theendobronchial tuberculosis was obtained by bronchoscopic biopy, washing cytology. The mean period of treatmentbefore follow-up CT scan is 5.2 months (2-12 months). Results : Improving process of the endobronchial lesionswere observed in 1 smooth tapered obstruction and 1 irregular narrowing. Normaization of the CT findings after orduring the medical treatment were seen in 4 smooth narrowing. 1 irregular narrowing, 1 tapered obstrction, 1V-shaped obstruction, 1 abrupt amputation, and 3 focal nodular narrowings. Little interval changes was observed inonly 1 case of the V-shaped obstruction. Conclusion : The patency of most of the narrowed or obstruted bronchuswere improved during or after medical treatment, except in one case of V-shaped obstruction.