To enable a driver to easily and accurately stop a vehicle in a start position when moving the vehicle along a prestored moving locus to park the vehicle.

When the vehicle advances along a moving locus from the state of being stopped in the start position, instructions are given to change over to reverse from advance in a turn-around position, and when the vehicle backs along the moving locus from the turn-around position, the vehicle is guided into a target parking position. A vehicle door is provided with marks 24LL, 24LR, and the marks 24LL, 24LR are made to coincide with the lateral white lines of the parking position to easily and accurately stop the vehicle in the start position.