A battery module including: a battery assembly including a plurality of rechargeable batteries; a case receiving the battery assembly; a battery management system (BMS) managing unit batteries of the battery assembly; and a relay installed to the case on an output line of the battery assembly and including a relay body configured to selectively block a current according to a signal of the BMS; a connection bar connected to the relay body; and an output terminal connected to the relay body via the connection bar and fastened to the case at a location spaced apart from the relay body.