A high reliable electric double layer capacitor is provided by increasing a sealing ability and strength of given portions of collecting terminals. In an electric double layer capacitor including a capacitor proper 1a produced by a plurality of stacked cells and an aluminum laminate film covering the exterior of the capacitor proper, a pair of collecting terminals 12 and 13 are provided at opposed portions of the capacitor proper 1a. Each collecting terminal 12 or 13 includes a first bent portion 12b or 13b that is bent to extend along a side surface 1b of the capacitor proper 1a and a second bent portion 12c or 13c that is bent to extend outward from a vertically middle position of the side surface 1b of the capacitor proper 1a. The second bent portions 12c and 13c of the pair of collecting terminals 12 and 13 are arranged to constitute a common plane and covered with the aluminum laminate film in such a manner that leading end portions of the pair of collecting terminals 12 and 13 protrude to the outside from the aluminum laminate film.