Authors present case report of 47-year-old woman with a rupture of trachea in its lower part after an intubation with a double-lumen tube without any problems. Tracheal lesion was discovered at the end of operation after an extirpation of mediastinal tumor and wedge resection of lung during the examination of hermeticity of lung mechanical suture. Rupture was cured by suture resorbable monofilamental material. Development after operation wasn't any different than a common lung resection. In the lecture authors discuss the possible causes of tracheal rupture, different kinds of therapy, and complications.