Desktop holder and portable terminal system

A desktop holder (2, 2a) includes a connector to be connected to a connector of a portable terminal (1, 1a) inserted into an insertion inlet (25), a connector to be connected to a memory card (4) inserted into a memory card slot (26), a cable (101, 102, 103, 103-1, 103-2) which connects connectors, and a connector which connects an AC adaptor, thereby enabling a battery pack (14) to be charged by the supply of charging DC voltage supplied from the AC adaptor to the portable terminal (1, 1a), as well as enabling the portable terminal (1, 1a) to read and write from/to the memory card (4) by key operation of the portable terminal (1, 1a).