Traumatic aortic injury is well recognized as a primary cause of instantaneous death in victims of thoracic blunt trauma presenting with an aortic rupture or dissection, particularly after a deceleration injury. However, a direct aortic injury caused by a fractured rib segment after blunt thoracic trauma is extremely rare. We report the case of a 43-yearold male patient who experienced an aortic injury caused by the sharp edge of a fractured rib after multiple rib fractures due to blunt thoracic trauma. [ J Trauma Inj 2015; 28: 31-33 ]