Blunt chest trauma can result in significant cardiothoracic injury, which can include a cardiac contusion, aortic injury, and myocardial valvular injury. Traumatic aortic regurgitation is an uncommon consequence of closed chest injury. Isolated aortic valvular injury following blunt chest trauma is difficult to diagnose in a patient with multiple injuries. We report a case of traumatic aortic regurgitation which was detected just before anesthesia induction in the operating room. This report is presented to emphasize the possibility of aortic regurgitation and the need for careful evaluation of the cardiac status in patients with blunt chest trauma.