One aspect of the present invention provides a rechargeable battery that is capable of preventing a vent from being oxidized by preserving a plating layer of a surface of a vent.An exemplary embodiment of the present invention provides a rechargeable battery, including: an electrode assembly for performing charging and discharging operations; a case for accommodating the electrode assembly; and a cap assembly combined to an opening of the case and sealing the case. The case includes a vent at one side, and the vent has a plurality of ends in a thickness direction of the case and includes a plating layer on its surface.