BATTERY

A battery including: a battery can including a cylindncal portion, a bottom wall closing one end of the cylindrical portion, and an open rim continuing to the other end of the cylindncal portion; an electrode body housed in the cylindrical portion; and a sealing body fixed to the open rim so as to seal an opening defined by the open rim. The sealing body includes a sealing plate, and a gasket disposed at a peripheral portion of the sealing plate. The gasket has an inner ring portion disposed on the peripheral portion on a side facing the electrode body, an outer ring portion disposed on the peripheral portion on a side opposite to the side facing the electrode body, and a side wall portion covering an end surface of the peripheral portion. The sealing plate and the gasket are integrally molded to be in close contact with each other.