PARKING ASSIST DEVICE, PARKING ASSIST METHOD, AND VEHICLE

A parking assist device including a retractable door handle device that includes a door handle with a built-in antenna used for a communication with a terminal carried by a user positioned outside a host vehicle and an actuator that causes the door handle to transition from a first state to a second state, the parking assist device comprising a processor that is configured to communicate with the terminal using the antenna, and that is configured to execute entry control for allowing the host vehicle to enter a parking spot or exit control for allowing the host vehicle to exit from the parking spot when a predetermined condition related to a communication result is met, wherein the processor causes the door handle to transition to the second state when executing the entry control or the exit control.