A battery module includes a plurality of battery cells stacked on one another, a cell housing configured to accommodate the plurality of battery cells, a top plate configured to cover an entire upper side of the cell housing and electrically connected to any one of positive electrodes and negative electrodes of the plurality of battery cells, and a bottom plate disposed to face the top plate and configured to cover an entire lower side of the cell housing and electrically connected to the other of the positive electrodes and the negative electrodes of the plurality of battery cells.