Two electrodes are drawn out from a wound capacitor element by a pair of leads. Each of electrodes forming the capacitor element includes a sheet-like collector, an electrode layer formed on the surface of the collector, and an exposed part provided on one edge of the collector. The electrode layer is not formed on the exposed part. The electrodes are wound such that the exposed parts come to both ends of the capacitor element. Two or more points of at least one of the exposed parts are connected together.