The thorax of the human body may periodically be exposed to undue trauma as the result of working conditions, automobile travel, or acts of violence. The contents of the thorax are unusually well protected by the ribs, sternum, and vertebral column. However, in spite of this protection, injury to the tracheobronchial tree occurs. Injuries to the trachea and major bronchi are infrequent and, therefore, no surgeon has extensive experience in this field.18 The early diagnosis and treatment of these lesions may be related to this lack of experience. However, it is fortunate that surgery of the bronchus and trachea has kept pace with the increasing frequency of this type of injury so that a damaged tracheobronchial tree can be restored to normal function. We have been fortunate in treating nine cases of closed traumatic injuries of the tracheobronchial tree and offer this experience to guide the surgical management of