Abstract: To provide a docking station for a portable computer, which increases its heat radiation when the docking station is docked with the portable computer. A docking station is equipped with a fan unit at a back portion of a power supply unit within a station body, and a front surface of a connection portion with which a notebook PC is docked is provided with an air suction opening. Thereby, once the fan unit is driven, high temperature air is exhausted from a station body and the connection portion, then outside air is introduced from the suction opening to stimulate the cooling of the connection portion, and the heat which is transferred from a back side portion of the notebook PC to the connection portion is also dissipated there to stimulate the cooling of the notebook PC side.