A 27-year-old woman had tracheal laceration caused by endotracheal intubation by bronehoscopy. She underwent bronchoalveolar lavage and bronchoscopic lung biopsy for suspected sarcoidosis. Endotracheal intubation was performed under bronchoscopic guidance without any difficulty, but, after intubation, tracheal laceration (approximately 3 cm in length) was observed. She was treated conservatively and the laceration healed spontaneously. Though tracheal lacerations are rare, it is necessary to be familiar with such severe complications.