Fractures of humeral neck and shoulder dislocation are regarded relatively harmless injury which nas no serious complication except immediate brachial plexus injury and later shoulder stiffness. The axillarial arterial tear and thrombosis associated with fracture of humeral neck was rarely reported since DeBakey in 1946, and the brachial plexus injury associated with humeral neck fracture and dislocation was also reported. But, the combined axillary artery and brachial plexus injury which are occurred delayed in several days after trauma, was never been reported. We report a case of delayed axillary arterial and brachial plexus injury associated with humeral neck fracture and dislocation with reference, which the patient was in state of confused mentality and uncontrolled motion of injured extremity becuase of the head trauma in automoble accident.