NOVELTY - An electrochemical capacitor comprises capacitor element; electrolyte with which the capacitor element is impregnated; and an exterior housing. The capacitor element has first electrode, second electrode facing the first electrode, and separator. The first electrode has a sheet-like first collector, first electrode layer formed on surface of the first collector, and first lead connected to the first collector.    USE - Electrochemical capacitor used for electronic devices, regeneration of hybrid vehicles or power storage.    ADVANTAGE - The electrochemical capacitor is able to charge and discharge large current, and has large power density.    DETAILED DESCRIPTION - An electrochemical capacitor comprises capacitor element; electrolyte with which the capacitor element is impregnated; and an exterior housing. The capacitor element has first electrode, second electrode facing the first electrode, and separator. The first electrode has sheet-like first collector, first electrode layer formed on surface of the first collector, and first lead connected to the first collector. The second electrode has a sheet-like second collector, second electrode layer formed on surface of second collector, and second lead connected to second collector. The separator is provided between first and second electrode. The first and second electrodes and separator are wound around a winding axis. The capacitor element has first end and second end on an opposite side of first end along the winding axis. The exterior housing accommodates the capacitor element and the electrolyte, and allows a part of the first and second leads to passing through to outside. The first collector has an exposed part exposed from the first electrode layer at the first end, or the second collector has a second exposed part exposed from the second electrode layer at the second end. At least one of two cases is satisfied that the first collector has the first exposed part, and two points of the first exposed part are electrically connected in a case that the first collector has the first exposed part, and at least two points of second exposed part is electrically connected in a case that the second collector has the second exposed part.