A motor comprising: a stator comprising a winding and a stator core around which the winding is wound; and a rotor attached to one end of a rotation shaft and rotating in response to a magnetic field of the stator, wherein the rotor comprises: a rotor core rotating integrally with the rotation shaft; a magnet disposed on an outer peripheral part of the rotor core; and two holders provided at both ends of the rotor core in an axial direction of the rotation shaft to restrict a movement of the magnet in the axial direction, the motor being characterized in that a central position of the stator core (C3) in the axial direction, a central position of the rotor core (C1) in the axial direction, and a central position of the magnet (C2) in the axial direction are deviated from each other, when a length between inner wall surfaces of the two holders facing each other in the axial direction is set to L1, a length of the magnet in the axial direction set to L2, and a length between the central position of the stator core in the axial direction and the central position of the rotor core in the axial direction set to L3, the lengths L1, L2, and L3 satisfy L1 - L2 < L3, and lengths between end surfaces of the rotor core and the inner wall surfaces of each of the holders facing the end surfaces of the rotor core in the axial direction are equal, the central position of the magnet (C2) in the axial direction is located between the central position of the stator core (C3) in the axial direction and the central position of the rotor core (C1) in the axial direction. a stator comprising a winding and a stator core around which the winding is wound; and a rotor attached to one end of a rotation shaft and rotating in response to a magnetic field of the stator, wherein the rotor comprises: a rotor core rotating integrally with the rotation shaft; a magnet disposed on an outer peripheral part of the rotor core; and two holders provided at both ends of the rotor core in an axial direction of the rotation shaft to restrict a movement of the magnet in the axial direction, a rotor core rotating integrally with the rotation shaft; a magnet disposed on an outer peripheral part of the rotor core; and two holders provided at both ends of the rotor core in an axial direction of the rotation shaft to restrict a movement of the magnet in the axial direction, the motor being characterized in that a central position of the stator core (C3) in the axial direction, a central position of the rotor core (C1) in the axial direction, and a central position of the magnet (C2) in the axial direction are deviated from each other, when a length between inner wall surfaces of the two holders facing each other in the axial direction is set to L1, a length of the magnet in the axial direction set to L2, and a length between the central position of the stator core in the axial direction and the central position of the rotor core in the axial direction set to L3, the lengths L1, L2, and L3 satisfy L1 - L2 < L3, and lengths between end surfaces of the rotor core and the inner wall surfaces of each of the holders facing the end surfaces of the rotor core in the axial direction are equal, the central position of the magnet (C2) in the axial direction is located between the central position of the stator core (C3) in the axial direction and the central position of the rotor core (C1) in the axial direction. <EOS>