Exterior for Secondary Battery and Secondary Battery Having the Same

Disclosed are an exterior for a secondary battery and a secondary battery. According to one aspect of the present invention, an exterior for a secondary battery, in which an internal space is defined, includes a first metal part and a second metal part spaced apart from the first metal part, wherein the first metal part is disposed closer to the internal space than the second metal part, and the first metal part has a thermal conductivity greater than a thermal conductivity of the second metal part.