A boarding assistance system includes a reception part for receiving a combination of information of a passenger vehicle which has been reserved by a user and information of the user who has reserved from a vehicle allocation system which allocates a passenger vehicle; an image acquisition part for acquiring a shot image of the user who has reserved by selecting any of the plurality of fixed-point cameras installed on a roadside based on the information of the user; and a display part for displaying information for identifying the user of the passenger vehicle on a predetermined display apparatus using the shot image of the user.