Battery module

A battery module includes a plurality of battery cells arranged in one direction; first and second end plates respectively disposed at outsides of the battery cells; and one or more support plates coupled to the first and second end plates. In the battery module, one and the other ends of the support plate are respectively coupled to the first and second end plates, and at least one of the support plates is coupled to at least one of the first and second end plates by a groove-projection connection.