A parking assistant includes: shooting part shooting surroundings; parking target position setter setting parking target position in surroundings image by shooting part; rearward movement starting position calculator calculating rearward movement starting position based on: target position by position setter, and vehicle's movable area, rearward movement starting position denoting position stopping vehicle and starting rearward movement of vehicle, to park vehicle in target position; movement calculator sensing movement direction and movement amount of vehicle; and image generator superposing an information image on surroundings image based on movement direction and amount which are sensed with movement calculator. Information image denotes rearward movement starting position for allowing vehicle to be parked in target position. According to vehicle's movement, image generator generates, with different displays, following sub-positions of rearward movement starting position: first sub-position allowing vehicle to move to target position, and second sub-position failing to allow vehicle to be parked in target position.