A rechargeable battery comprising: an electrode assembly; a case housing the electrode assembly; a cap plate sealing an opening of the case; an electrode terminal (21, 22) that is electrically connected to the electrode assembly and extends through a terminal hole (H1, H2) of the cap plate and is oriented on an exterior of the cap plate; and an insulating member (46, 47) that electrically insulates the cap plate and the electrode terminal (21, 22) from each other while supporting the electrode terminal (21, 22) at an exterior surface of the cap plate, wherein the insulating member (46, 47) defines a heat avoidance space such that the heat avoidance space is formed between the cap plate and the electrode terminal (21, 22), the heat avoidance space being configured to dissipate welding heat, and wherein the electrode terminal (21, 22) comprises: a current collecting portion (211, 221) that is connected to the electrode assembly; a pillar portion (212, 222) that is connected to the current collecting portion (211, 221) and is located at the terminal hole (H1, H2); and a plane portion (213, 223) that is connected to the pillar portion (212, 222) and extends in a direction away from the terminal hole (H1, H2), characterized in that the insulating member comprises: a first insulating portion that encloses the pillar portion at the terminal hole (H1, H2) and that supports one side of the plane portion; a second insulating portion that is spaced from the first insulating portion along the cap plate to support another side of the plane portion; a fourth insulating portion that is oriented in the width direction between the first insulating portion and the second insulating portion on the bottom portion to support the plane portion; and a bottom portion that connects the first insulating portion and the second insulating portion at an exterior surface of the cap plate, the plane portion faces and is spaced from the bottom portion of the insulating member at both sides of a width direction of the cap plate, the heat avoidance space is located at both sides of a width direction of the cap plate. an electrode assembly; a case housing the electrode assembly; a cap plate sealing an opening of the case; an electrode terminal (21, 22) that is electrically connected to the electrode assembly and extends through a terminal hole (H1, H2) of the cap plate and is oriented on an exterior of the cap plate; and an insulating member (46, 47) that electrically insulates the cap plate and the electrode terminal (21, 22) from each other while supporting the electrode terminal (21, 22) at an exterior surface of the cap plate, wherein the insulating member (46, 47) defines a heat avoidance space such that the heat avoidance space is formed between the cap plate and the electrode terminal (21, 22), the heat avoidance space being configured to dissipate welding heat, and wherein the electrode terminal (21, 22) comprises: a current collecting portion (211, 221) that is connected to the electrode assembly; a pillar portion (212, 222) that is connected to the current collecting portion (211, 221) and is located at the terminal hole (H1, H2); and a plane portion (213, 223) that is connected to the pillar portion (212, 222) and extends in a direction away from the terminal hole (H1, H2), characterized in that a current collecting portion (211, 221) that is connected to the electrode assembly; a pillar portion (212, 222) that is connected to the current collecting portion (211, 221) and is located at the terminal hole (H1, H2); and a plane portion (213, 223) that is connected to the pillar portion (212, 222) and extends in a direction away from the terminal hole (H1, H2), characterized in that the insulating member comprises: a first insulating portion that encloses the pillar portion at the terminal hole (H1, H2) and that supports one side of the plane portion; a second insulating portion that is spaced from the first insulating portion along the cap plate to support another side of the plane portion; a fourth insulating portion that is oriented in the width direction between the first insulating portion and the second insulating portion on the bottom portion to support the plane portion; and a bottom portion that connects the first insulating portion and the second insulating portion at an exterior surface of the cap plate, the plane portion faces and is spaced from the bottom portion of the insulating member at both sides of a width direction of the cap plate, the heat avoidance space is located at both sides of a width direction of the cap plate. a first insulating portion that encloses the pillar portion at the terminal hole (H1, H2) and that supports one side of the plane portion; a second insulating portion that is spaced from the first insulating portion along the cap plate to support another side of the plane portion; a fourth insulating portion that is oriented in the width direction between the first insulating portion and the second insulating portion on the bottom portion to support the plane portion; and a bottom portion that connects the first insulating portion and the second insulating portion at an exterior surface of the cap plate, the plane portion faces and is spaced from the bottom portion of the insulating member at both sides of a width direction of the cap plate, the heat avoidance space is located at both sides of a width direction of the cap plate.