A rechargeable battery comprising: an electrode assembly; a battery terminal (120, 130) electrically coupled to the electrode assembly; a case accommodating the electrode assembly; and a cap assembly comprising a cap plate for sealing the case, wherein the battery terminal (120, 130) comprises: a collecting plate (121, 131) electrically coupled to the electrode assembly; a collecting terminal (122, 132) electrically coupled to the collecting plate (121, 131), the collecting terminal (122, 132) having a body (122a, 132a) passing through the cap plate; and a coupling terminal (123, 133) electrically and mechanically coupled to the body (122a, 132a), wherein the coupling terminal (123, 133) has: a collecting terminal hole (123e, 133e) for passing the body (122a, 132a) therethrough; a thread (123c, 133c) for electrically coupling the coupling terminal (123, 133) to another rechargeable battery or an external device; and a rotation-preventing member, wherein the battery comprises a first battery terminal and a second battery terminal, and the cap assembly further comprises: a connection plate mechanically and electrically coupling the body of the first battery terminal to the cap plate; and a sealing gasket mechanically coupling and electrically insulating the body of the second battery terminal to and from the cap plate, characterized in that the rotation-preventing member of the first battery terminal is a first rotation-preventing groove or a first rotation-preventing protrusion mating with a corresponding first protrusion or a corresponding first groove, respectively, of the cap plate. an electrode assembly; a battery terminal (120, 130) electrically coupled to the electrode assembly; a case accommodating the electrode assembly; and a cap assembly comprising a cap plate for sealing the case, wherein the battery terminal (120, 130) comprises: a collecting plate (121, 131) electrically coupled to the electrode assembly; a collecting terminal (122, 132) electrically coupled to the collecting plate (121, 131), the collecting terminal (122, 132) having a body (122a, 132a) passing through the cap plate; and a coupling terminal (123, 133) electrically and mechanically coupled to the body (122a, 132a), wherein the coupling terminal (123, 133) has: a collecting terminal hole (123e, 133e) for passing the body (122a, 132a) therethrough; a thread (123c, 133c) for electrically coupling the coupling terminal (123, 133) to another rechargeable battery or an external device; and a rotation-preventing member, wherein a collecting plate (121, 131) electrically coupled to the electrode assembly; a collecting terminal (122, 132) electrically coupled to the collecting plate (121, 131), the collecting terminal (122, 132) having a body (122a, 132a) passing through the cap plate; and a coupling terminal (123, 133) electrically and mechanically coupled to the body (122a, 132a), wherein the coupling terminal (123, 133) has: a collecting terminal hole (123e, 133e) for passing the body (122a, 132a) therethrough; a thread (123c, 133c) for electrically coupling the coupling terminal (123, 133) to another rechargeable battery or an external device; and a rotation-preventing member, wherein a collecting terminal hole (123e, 133e) for passing the body (122a, 132a) therethrough; a thread (123c, 133c) for electrically coupling the coupling terminal (123, 133) to another rechargeable battery or an external device; and a rotation-preventing member, wherein the battery comprises a first battery terminal and a second battery terminal, and the cap assembly further comprises: a connection plate mechanically and electrically coupling the body of the first battery terminal to the cap plate; and a sealing gasket mechanically coupling and electrically insulating the body of the second battery terminal to and from the cap plate, characterized in that the rotation-preventing member of the first battery terminal is a first rotation-preventing groove or a first rotation-preventing protrusion mating with a corresponding first protrusion or a corresponding first groove, respectively, of the cap plate. a connection plate mechanically and electrically coupling the body of the first battery terminal to the cap plate; and a sealing gasket mechanically coupling and electrically insulating the body of the second battery terminal to and from the cap plate, characterized in that the rotation-preventing member of the first battery terminal is a first rotation-preventing groove or a first rotation-preventing protrusion mating with a corresponding first protrusion or a corresponding first groove, respectively, of the cap plate.