Occurrence of Diffuse Alveolar Hemorrhage Syndrome (DAH) after blunt thoracic trauma is rare. It is more common to occure in a immuno deficient patient or in drug dependent people. We present a case of DAH, which occured in young man after blunt thoracic injury. Clinically it was presented by hemoptysis. No respiratory insufficiency was recorded and DAH was treated without need of mechanical pulmonal ventilation.