A stacked rotor core of a motor, the rotor core comprising: a first rotor core member, a second rotor core member and a third rotor core member, each of the first, second and third rotor core members (110, 120, 130) formed by stacking a plurality of thin disk-shaped rotor core members at a predetermined height, a shaft hole penetratively formed in a center of each thin disk-shaped rotor core member, a shaft press-fitted into the shaft hole, and a plurality of teeth on each of the first, second and third rotor core members (110, 120, 130) formed to protrude from an inner circumferential surface of the shaft hole, wherein the first rotor core member is formed with the plurality of teeth protruding at a first position, wherein the second rotor core member is formed with the plurality of teeth protruding at a second position and having a predetermined angle difference from that of the first position in the circumferential direction, wherein the third rotor core member is formed with the plurality of teeth protruding at a third position and having a predetermined angle difference from that of the second position in the circumferential direction, characterised in that a plurality of magnet insertion holes is penetratively formed at a position near a periphery of the plurality of thin disk-shaped rotor core members for insertion and coupling of a plurality of magnets, a skived portion is formed on the shaft to protrude at a position corresponding to the plurality of teeth of the first, second and third rotor core members (110,120,130), the skived portion includes a first skived portion formed at a position corresponding to that of the teeth of the first rotor core member, a second skived portion formed at a position corresponding to that of the teeth of the second rotor core member, and a third skived portion formed at a position corresponding to that of the teeth of the third rotor core member, the skived portion is formed only at a position corresponding to the plurality of teeth of each of the first, second and third rotor core members (110, 120, 130), and the positions of the shaft which correspond to the first, second and third rotor core members (110, 120, 130) but do not correspond to the plurality of teeth of each of the first, second and third rotor core members (110, 120, 130) are not skived. a first rotor core member, a second rotor core member and a third rotor core member, each of the first, second and third rotor core members (110, 120, 130) formed by stacking a plurality of thin disk-shaped rotor core members at a predetermined height, a shaft hole penetratively formed in a center of each thin disk-shaped rotor core member, a shaft press-fitted into the shaft hole, and a plurality of teeth on each of the first, second and third rotor core members (110, 120, 130) formed to protrude from an inner circumferential surface of the shaft hole, wherein the first rotor core member is formed with the plurality of teeth protruding at a first position, wherein the second rotor core member is formed with the plurality of teeth protruding at a second position and having a predetermined angle difference from that of the first position in the circumferential direction, wherein the third rotor core member is formed with the plurality of teeth protruding at a third position and having a predetermined angle difference from that of the second position in the circumferential direction, characterised in that a plurality of magnet insertion holes is penetratively formed at a position near a periphery of the plurality of thin disk-shaped rotor core members for insertion and coupling of a plurality of magnets, a skived portion is formed on the shaft to protrude at a position corresponding to the plurality of teeth of the first, second and third rotor core members (110,120,130), the skived portion includes a first skived portion formed at a position corresponding to that of the teeth of the first rotor core member, a second skived portion formed at a position corresponding to that of the teeth of the second rotor core member, and a third skived portion formed at a position corresponding to that of the teeth of the third rotor core member, the skived portion is formed only at a position corresponding to the plurality of teeth of each of the first, second and third rotor core members (110, 120, 130), and the positions of the shaft which correspond to the first, second and third rotor core members (110, 120, 130) but do not correspond to the plurality of teeth of each of the first, second and third rotor core members (110, 120, 130) are not skived.