PARKING ASSISTANCE DEVICE

A parking position at which an own-vehicle can be parked can be stably displayed. A parking assistance device includes a parking region detection unit configured to periodically detect a parking-possible space in which the own-vehicle can be parked based on a result of detection by an external image capturing camera and a sonar configured to periodically detect the status of surroundings of the own-vehicle a candidate region selection unit configured to select a parking candidate space as a parking candidate for the own-vehicle among the parking-possible spaces detected by the parking region detection unit and a display control unit configured to cause a touch panel to display a surrounding image in which a parking position image illustrating a parking position is superimposed on the parking candidate space selected by the candidate region selection unit and the candidate region selection unit continuously selects, as the parking candidate space, the parking-possible space corresponding to the selected parking candidate space for a predetermined duration.