Lung separation using a double-lumen endobronchial tube is necessary for video assisted thoracoscopy (VATs). Bronchial rupture after intubation with a double-lumen endobronchial tube has been rarely reported. We report a case of a 70-year-old man who had solitary pulmonary nodule in his right upper lobe. He was intubated with a left-sided Robertshaw double-lumen endobronchial tube. He underwent a VATs right upper lobectomy with the one-lung ventilation of left lung. During the operation, the rupture of the left mainstem bronchus was detected. Immediately, the thoracotomy was performed and the ruptured left mainstem bronchus was repaired with absorbable sutures (vicryl). Seven days later he had a bronchoscopy to examine the left mainstem bronchus. There was no evidence of the bleeding, leakage and inflammation. Subsequent course was uneventful. Tracheobronchial injuries related to the double-lumen endobronchial tube are discussed.