Battery Module and Battery Pack Including the Same

A battery module with improved space utilization of a secondary battery includes a battery cell stack in which a plurality of battery cells are stacked; a busbar frame formed on a front surface or a rear surface of the battery cell stack; a terminal busbar formed outside the busbar frame based on the battery cell stack to be electrically connected to an external power source; and an end plate covering the busbar frame, wherein the terminal busbar is formed is formed to have a recessed side surface, and a nut is inserted into a space formed by the recessed side surface and the busbar frame. A battery pack including the battery module is also provided.