A desktop holder includes a connector to be connected to a connector of a portable terminal inserted into an insertion inlet, a connector to be connected to a memory card inserted into a memory card slot, a cable which connects connectors, and a connector which connects an AC adaptor, thereby enabling a battery pack to be charged by the supply of charging DC voltage supplied from the AC adaptor to the portable terminal, as well as enabling the portable terminal to read and write from/to the memory card by key operation of the portable terminal.