Disclosed is a battery pack suitable for preventing simultaneous separation of both end portions of a handle unit from an upper case during moving of a lower case and the upper case which are sequentially stacked. A battery pack, according to the present invention, comprises a lower case and an upper case which are sequentially stacked and cover a battery module, wherein the upper case has a housing and a handle unit rotating relative to the housing and mounted on the housing, wherein the handle unit has shaft hangers being passed through by means of rotation support staffs of the housing and rotationally coupled at angles different from the angles of the rotation support shafts, respectively.