Data is transmitted through a plurality of types of communication networks to a mobile communication terminal while a handover of the mobile communication terminal is handled. A communication control apparatus 10 is adapted to control data communication to a cell phone 50 connectable to a plurality of types of communication networks, and is composed of a detecting unit 12 for detecting a connection status of the cell phone 50 in each mobile communication network; an assigning unit 13 for assigning data addressed to the cell phone 50, to each mobile communication network to which the cell phone 50 is connected, based on a volume of the data addressed to the cell phone 50 and the detected connection status; a transmitting unit 15 for transmitting the data assigned to each mobile communication network, to the each mobile communication network; and a handover processing unit 14 for performing a handover process in the plurality of types of mobile communication networks, based on the detected connection status.