A power storage cell includes a cathode, an anode, a separator, and a sealing portion. The sealing portion includes a first resin layer, a second resin layer, a third resin layer provided between the first resin layer and the second resin layer and welded to the first resin layer and the second resin layer, and a welded area formed by an outer edge portion of the first resin layer, an outer edge portion of the second resin layer, and an outer edge portion of the third resin layer being integrated with each other by welding. An inner edge of the welded area is positioned outward of an inner edge of a bonded area between the first resin layer and the current collector and an inner edge of a bonded area between the second resin layer and the current collector.