SUMMARY Objective: The study aimed to research causes, imaging features on CT scan and endoscopy, the correlation between CT scan and endoscopy in tracheal stenosis disease. Subjects and methods: Descriptive cross-sectional study, 14 patients was diagnosed tracheal stenosis at Bach Mai hospital from March 2019 to July 2020. Instruments of data collection included medical records, endoscopy and CT scan results. SPSS software was then employed for data analysis. Results: 14 patients in the study, 10 males (71,4%), 4 females (28,6%). Average age was 41.7±13.8. The cause of intubation and tracheostomy was diverse, but the main cause was traumatic brain injuries due to traffic accidents (4 patients). Prominent clinical symptom was difficult inspiration and stridor. Imaging features of tracheal stenosis on CT scan: The mean distance from vocal cord was 29mm. According to Cotton classification, grade III was highest proption ( 71,4%), the remaining was grade II (28,6%), no case was grade I and IV. The mean length of stenosis was 20mm. On endoscopy, the mean distance from vocal cord was 33mm. The correlation between three-dimensional 128-slice CT scanning and endoscopy was concluded: Similar evaluation of the distance from vocal cord to upper end of stenosis, no statistical significance (p>0.05) Key words: tracheal stenosis, intubation and tracheostomy, 128-slice CT scanning, the correlation between CT scan and endoscopy