A cold storage body that comprises a hermetically sealed vessel made of aluminum alloy in which a cold storage medium in an appropriate amount is enclosed with a space remaining within the vessel filled with a compressed inert gas at an appropriate pressure. The vessel may comprise a can type trunk portion of a thin aluminum sheet having an open end with a cover member closing the open end of the trunk member. The thus formed cold storage body has sufficient strength regardless of temperature variation for cooling the cold storage body as well as a long durability and a high corrosion resisting property.