Provided is a motor which includes a housing; a stator disposed in the housing, a rotor disposed in the stator, and a busbar disposed on one side of the stator, wherein the stator includes, a stator core, a coil wound around the stator core, and an insulator disposed between the stator core and the coil, the insulator includes, an outer circumferential part that faces the housing, an inner circumferential part that faces the rotor, and an extension part that protrudes from the inner circumferential part toward the busbar, the busbar includes a guide that protrudes from an inner circumferential surface thereof, and the extension part is in contact with the inner circumferential surface of the busbar and a lateral surface of the guide.