The present invention relates to a battery pack including a bare cell for charge/discharge of an electric current; a protection circuit board electrically connected to the bare cell and protecting the bare cell against overcharge/discharge thereof; a connector serving as a current path between the bare cell and an external apparatus; a cover frame disposed on the bare cell to cover the protection circuit board; and a connector housing where the connector is disposed and which is exposed to the outside of the cover frame. The assembly strength of the battery pack is improved due to solid mounting of the connector housing on the protection circuit board and non-separable connection of the connector housing and the cover frame.