A battery module including a plurality of unit batteries, a pair of end plates located at outermost sides of the plurality of unit batteries and connecting rods disposed at first and second edges of at least one of the end plates, the first and second edges being opposite edges, wherein the connecting rods fix the pair of end plates to the plurality of unit batteries, and the connecting rods are spaced apart at different intervals along the first and second edges of the at least one end plate.