Background. Tracheal rupture is an uncommon but serious complication of endotracheal intubation. Case. An 83-year-old woman had interstitial pneumonia on screening with 18F-fluorodeoxyglucose-positron emission tomography. Chest CT demonstrated reticular and ground glass shadows in both lower lobes. We performed bronchoalveolar lavage and transbronchial lung biopsy (TBLB) to diagnose her interstitial lung disease. After TBLB she had massive bleeding and we aspirated a blood clot following intubation using bronchoscopy. Next day chest CT showed subcutaneous emphysema of mediastinal emphysema, with a tracheal tear on the lower trachea. We could detected mediastinum emphysema on the chest X-ray just after bronchoscopy. We diagnosed a rupture of the trachea which occurred during aspiration of the clot and transferred her to the critical care medical center. Her respiratory status was stable without ventilation and her subcutaneous emphysema did not progress. She improved with conservative treatment. Conclusion. Tracheal rupture following intubation during bronchoscopy is rare but this complication can occur on occasion.