The concept of the present invention relates to a storage device and more specifically, to a storage device which includes: a first semiconductor device which is mounted on a substrate; a housing which receives the substrate and includes a first fixing unit which fixes the substrate; a first thermal conductive plate which is interposed between the first semiconductor device and the housing, and has thermal conductivity which is higher than the thermal conductivity of the substrate. The storage device according to the present invention is effective in quickly discharging the heat generated from the first semiconductor device to the outside.
