PURPOSE: To provide a dead angle dissolving device for vehicle which can dis solve both of the dead angle in the vicinity of a front tire and the dead angle in the vicinity of a rear tire.

CONSTITUTION: A dead angle dissolving device consists of a CCD camera 19 which is installed on a vehicle body so as to include the vicinity of a front tire and a door mirror 17 within a viewfield range, angle adjusting switch 2 of a driving circuit 15 for adjusting the angle of the door mirror 17, and a monitor 9 for displaying an image. Further, the dead angle dissolving device is equipped with a control circuit CS which is provided with the monitor running OFF mode in which the driving circuit 15 is turned ON/OFF when the angle adjusting switch 2 is turned ON/OFF in the nonoperation mode of the monitor 9, monitor turning ON mode in which the driving circuit 15 is turned ON/OFF when the angle adjusting switch 2 is turned ON/OFF, in the operation mode of the monitor, and the prohibition mode in which the driving circuit 15 is controlles so that the door mirror 17 reflects the vicinity of a rear tire in the operation mode of the monitor 9 and the drive of the driving circuit 15 is prohibited.