The parking assist apparatus

When entering the parking space with respect to the vehicle by the steering means (2) for automatic control or auxiliary exit, the size of a parking space (extra length) increases the size of the margin with respect to the vehicle, is calculated by the the motor means (2) is generated by performing automatic control (2a) of the temperature rise to a larger value. Further, by the temperature rise amount to the temperature of the motor (2a) of the value, calculated by the electric motor (2a) associated to the automatic control of the execution of the temperature rise of the predicted current temperature. Further, the predicted temperature is higher than the value thus determined value, prohibit execution of the automatic control, on the other hand, the predicted temperature value is less than the determination of such a low value, allowing the implementation of the automatic control.