Tracheobronchial rupture is considered to be a life-threatening condition and most commonly occurs after blunt trauma to the neck or chest. However, single- and double-lumen endotracheal tubes can cause serious airway injury. The recognition of this complication and a knowledge of the possible contributory factors is critical, because failure to do so could result in lethal events. We report the case of a 63-year-old male patient who developed pneumomediastinum three days after routine orotracheal intubation.