A battery module includes a battery cell stack in which a plurality of battery cells are stacked, and a busbar frame located on a front surface or a rear surfaces of the battery cell stack, the busbar frame includes a support part surrounding at least a portion of a bottom surface of the battery cell stack, and the support part includes an extension region extending from the busbar frame in a lengthwise direction of a battery cell of the plurality of battery cells, and a protrusion region on the extension region.