A battery module according to an embodiment of the present disclosure may include: a battery cell stack having a plurality of battery cells stacked in a stacking direction; a module frame accommodating the battery cell stack; a thermally conductive resin layer located between a lower surface of the module frame and the battery cell stack; and a first adhesive layer located between adjacent battery cells, among the plurality of battery cells, and a liquid injection hole for injecting the thermally conductive resin layer may be formed on the lower surface of the module frame and the first adhesive layer is formed adjacent to the thermally conductive resin layer.