To furthermore reduce weight and thickness in a battery pack equipped with a plurality of built-in bare cells.

A battery pack according to the present invention includes: a plurality of bare cells, each of which having a cap assembly and a bottom face that is located at a position corresponding to the cap assembly; a protection circuit module included in the bare cells; a cover frame covering the bare cells and the protection circuit module and comprising a first frame and a second frame; and an exterior member covering the bare cells.