Battery module comprising end plates having improved strucutre, and end plate member therefor

The present invention discloses a battery module comprising: a cell assembly in which a plurality of cells are arranged in one direction; and an end plate member which covers at least the outermost side of the cell assembly in the cell arrangement direction, wherein the end plate member has two or more open parts that are composed of holes perforated in the thickness direction of the end plate, and frame parts that are located between neighbouring open parts.