In apparatus and method for delivering road map data, a plurality of road map data are stored in a road map data storage unit, one of the road map data which corresponds to the road map data requested to be delivered from the road map storage unit is retrieved and delivered in response to a request to deliver the road map data to a movable body issued from the same movable body, a delivery history of each road map data is stored, and a charging process for the delivery of the road map data is carried out in such a way as to refer to the delivery history of the road map data stored and to charge an amount of money discounted from a predetermined amount of money at a rate of discount varied in accordance with a degree of an overlap in a case where the road map data presently delivered to the road map data delivery requested movable body includes a portion on which the road map data delivered to the same movable body in the past is overlapped.