A rechargeable battery includes an electrode assembly including a first electrode and a second electrode, a case to receive the electrode assembly, a cap plate coupled with the case and including a short circuit hole, a first terminal electrically connected to the first electrode, a second terminal electrically connected to the second electrode, an upper insulator member disposed between the second terminal and the cap plate, the upper insulator member having a connection hole communicating with the short circuit hole, and a terminal hole spaced apart from the connection hole, a short circuit member in the short circuit hole to electrically connect the cap plate with the second terminal when the short circuit member is modified, and a gap between the upper insulator member and the cap plate, the gap extending continuously from the connection hole toward the terminal hole.