A rechargeable battery includes an electrode assembly including a first electrode, a separator, and a second electrode, a case for accommodating the electrode assembly, and defining an opening at a side of the case for receiving the electrode assembly, a cap assembly mounted to the case at the opening of the case, and including a first electrode terminal and a second electrode terminal respectively electrically connected to the first electrode and the second electrode, and a protective member for covering the case and the cap assembly, and including a first bonding portion corresponding to a bottom surface of the case, a plurality of second bonding portions respectively corresponding to first lateral walls of the case, and a plurality of finish portions respectively overlapping opposite ends of the second bonding portions.