POWER STORAGE DEVICE

A battery includes an outer case including a tubular part with a tubular shape, a bottom part closing one end of the tubular part, and an opening disposed at the other end of the tubular part; an electrode assembly disposed inside the outer case and including a positive electrode and a negative electrode; a sealing body sealing the opening of the outer case; and a gasket with insulating properties interposed between the outer case and the sealing body. The gasket includes a first gasket with a circular shape, and a second gasket with a circular shape located closer to the bottom part than the first gasket is in the axial direction.