Aortic rupture is the most common great vessel injury that occurs in a patient with severe chest trauma. Rib fractures which caused direct aortic injuries are very rare. There are only two case reports in the literature. We present a patient had a car accident with bilateral multiple rib fractures who had aortic laceration caused by a depressed left sixth fracture rib in the third day after admission. The patient was immediately sent to the operating room for repairing aortic laceration by emergency thoracotomy. She was completely recovered and discharged thirteen days after thoracotomy.