The present invention provides a motor comprising, a shaft, a rotor including a shaft hole in which the shaft is disposed, the rotor including a plurality of rotor plates stacked to each other and a stator disposed outside the rotor, wherein each rotor plate includes a plurality of guide pin holes disposed around the shaft hole in a circumferential direction and a skew check hole including a skew reference surface, wherein an outer circumferential surface of each rotor plate is attached with magnets, and an angle between lines connecting centers of the adjacent guide pin holes with a center of the shaft hole is greater than a skew angle of each rotor plate.