Rechargeable battery comprising a fuse

A rechargeable battery according to an exemplary embodiment of the present invention includes an electrode assembly that performs charging and discharging in order to improve stability, a case in which the electrode assembly is installed, a cap assembly that includes a cap plate that is combined with the case and a terminal that protrudes to the outside, a fuse portion that is electrically connected to the electrode assembly and has a concave portion and a blocking member that is inserted into the concave portion and has electric insulation property.