Electrical storage device

An electrical storage device includes: a conductive battery house casing 110 electrically connected to a chassis 500; a plurality of battery cells 140 held in the battery house casing 110; and a control unit 900 that comprises a circuit that manages the plurality of battery cells 140 and is mounted on the battery house casing 110 so that a negative terminal of the circuit and the battery house casing 110 are electrically conducting.