A motor comprising: A stator including a stator core, a coil wound around the stator core, and an insulator mounted on the stator core and configured to insulate the coil and the stator core; a busbar disposed on the stator and conductively connected to the coil; a rotor disposed inside the stator; and a shaft coupled to the rotor, wherein the insulator includes a vibration prevention unit which extends upward from an upper surface of an inner circumferential part thereof and is in contact with an inner circumferential surface of the busbar, characterised in that: the busbar includes a plurality of slots which are formed in the inner circumferential surface thereof in a circumferential direction and the vibration prevention unit is inserted into the slots and includes guide units disposed between the adjacent slots and protruding inward from the inner circumferential surface thereof, wherein sides of the vibration prevention unit are in contact with and rub sides of the guide units, wherein the vibration prevention unit includes a hook formed on an upper end thereof and the hook is formed to protrude inward, and the hook includes a blocking surface blocking an upper surface of the busbar, wherein the slots are formed to be inclined toward the center of a ring-shaped body made of an insulating material and provided on the busbar, wherein a side of the vibration prevention unit is formed to be inclined. A stator including a stator core, a coil wound around the stator core, and an insulator mounted on the stator core and configured to insulate the coil and the stator core; a busbar disposed on the stator and conductively connected to the coil; a rotor disposed inside the stator; and a shaft coupled to the rotor, wherein the insulator includes a vibration prevention unit which extends upward from an upper surface of an inner circumferential part thereof and is in contact with an inner circumferential surface of the busbar, characterised in that: the busbar includes a plurality of slots which are formed in the inner circumferential surface thereof in a circumferential direction and the vibration prevention unit is inserted into the slots and includes guide units disposed between the adjacent slots and protruding inward from the inner circumferential surface thereof, wherein sides of the vibration prevention unit are in contact with and rub sides of the guide units, wherein the vibration prevention unit includes a hook formed on an upper end thereof and the hook is formed to protrude inward, and the hook includes a blocking surface blocking an upper surface of the busbar, wherein the slots are formed to be inclined toward the center of a ring-shaped body made of an insulating material and provided on the busbar, wherein a side of the vibration prevention unit is formed to be inclined. the busbar includes a plurality of slots which are formed in the inner circumferential surface thereof in a circumferential direction and the vibration prevention unit is inserted into the slots and includes guide units disposed between the adjacent slots and protruding inward from the inner circumferential surface thereof, wherein sides of the vibration prevention unit are in contact with and rub sides of the guide units, wherein the vibration prevention unit includes a hook formed on an upper end thereof and the hook is formed to protrude inward, and the hook includes a blocking surface blocking an upper surface of the busbar, wherein the slots are formed to be inclined toward the center of a ring-shaped body made of an insulating material and provided on the busbar, wherein a side of the vibration prevention unit is formed to be inclined.