Parking assist apparatus and parking assist method for vehicle

Parking assist apparatus and method cause a vehicle driver to set a target parking position in which the vehicle is to be parked by prompting the driver to specify the position of a parking space frame in the screen of a touch display by touch-operating arrow button switches shown in the screen, and then calculate a path to the target parking position. If a path to the target parking position is not generated by calculation, the arrow button switches for moving the parking space frame in such directions that a path will not be generated (i.e., the vehicle cannot be parked), among all the arrow button switches, are made non-displayed or are displayed dimmer than the other arrow button switches, and are disabled.