The invention discloses a mobile apparatus, a service providing system, and a control program. The mobile apparatus travels within a predetermined service provision area and, in response to receiving an instruction to provide a service from at least one user present in the service provision area, travels to the user to provide the service to the user. The mobile apparatus moves to a priority stand-by position which is determined based on a location of the at least one user from a plurality of stand-by positions provided within the service provision area and waits for the instruction to provide a service.