An electric double layer capacitor employs a paste electrode (33) between collector electrodes (34). The paste electrode (33) is compressed under a small load because the collector electrodes (34) are pressed by compression plates (21) in only an area corresponding to the paste electrode (33). With the paste electrode (33) thus compressed, the internal resistance of the capacitor is reduced and the capacitance of the capacitor is stable. The electric double layer capacitor comprises a stack of basic cells (30) or capacitor elements. The basic cells (30) are held closely together by a bolt (23) which extends through central holes (31) in the basic cells (30) and interconnects the compression plates (21), so that the basic cells (30) are compressed under a uniform and appropriate pressure.
