Electric double-layer capacitor device

An electric double layered capacitor comprising a bag-shaped soft case (5) in which a plurality of positive electrodes and negative electrodes, and a separator are received and laminated together with an electrolytic solution, a capacitor cell (1) provided with the soft case (5), a capacitor module (20) to receive and laminate a plurality of the capacitor cells (1) in a hard case (21) for thermal radiation, a control box (41) receiving a control substrate (42) to control charge and discharge of the capacitor cells (1) for equalizing of stored voltage at each capacitor cell (1), and a capacitor unit (40) formed of connecting the control box (41) to the capacitor module (20), wherein the hard case (21) is supported to the control box (41) being exposed to an outside of the control box (41).