An electric double layer capacitor 200 is configured such that a positive electrode 206, a separator 205, and a negative electrode 207 stacked in this order are contained in a container, and a portion between the positive electrode 206 and the negative electrode 207 is filled with an electrolytic solution. A polar plate of one or each of the positive electrode 206 and the negative electrode 207 includes a current collector 201, 203 and a plurality of electrically-conductive fine fibers 202, 204 formed and standing on a surface of the current collector such that one end of each of the fine fibers is electrically connected to the surface of the current collector. A surface of the polar plate is covered with the separator 205, the surface corresponding to the surface of the current collector. The polar plate and the separator 205 are pressure bonded to be integrated with each other. In the electric double layer capacitor using the electrically-conductive fine fiber, such as a carbon nanotube, as an active material, energy density can be increased by densely compressing the active material.