A permanent magnet type motor comprising: a rotor including a rotor iron core, and permanent magnets placed in the rotor iron core and forming magnetic poles; and a stator including a stator iron core and armature windings stored in a plurality of slots formed in the stator iron core, the armature windings being composed of two sets of three-phase windings which are first and second armature windings(26-1,26-2), wherein the first armature windings are supplied with current from a first inverter, the second armature windings are supplied with current from a second inverter, of the two sets of three-phase windings, the first armature windings are composed of windings for U1 phase, V1 phase, and W1 phase, and the second armature windings are composed of windings for U2 phase, V2 phase, and W2 phase, the windings for U1 phase and U2 phase are stored in slots adjacent to each other, the windings for V1 phase and V2 phase are stored in slots adjacent to each other, the windings for W1 phase and W2 phase are stored in slots adjacent to each other, driving is performed such that phases of currents flowing in the two sets of three-phase windings (26-1,26-2) are different from each other by 20 degrees to 40 degrees in electric angle, characterized in that the rotor is composed of m stages of rotor component units(11a1-11a4:11b1,11b2:11c1,11c2) arranged in an axial direction, and the m stages of rotor component units(11a1-11a4: 11b1, 11b2: 11c1, 11c2) are skewed to have a stage-skew structure with a skew angle θ, unit: degree, wherein the m stages of rotor component units(11a1-11a4:11b1,11b2:11c1,11c2) each include rare-earth permanent magnets as the permanent magnets, the skew angle θ (unit: degree) between the adjacent units of the m stages of rotor component units (11a1-11a4:11b1,11b2:11c1,11c2) satisfies 30/m ≦ θ ≦ 43.2/m, m is an integer equal to or greater than 2, in electric angle, a number N of slots in the stator iron core and a number M of poles in the rotor satisfy N = 6M and 6 ≦ M ≦ 14 (N and M are integers), and a thickness of a core back of the stator iron core is not smaller than 4 mm and not greater than 7 mm. a rotor including a rotor iron core, and permanent magnets placed in the rotor iron core and forming magnetic poles; and a stator including a stator iron core and armature windings stored in a plurality of slots formed in the stator iron core, the armature windings being composed of two sets of three-phase windings which are first and second armature windings(26-1,26-2), wherein the first armature windings are supplied with current from a first inverter, the second armature windings are supplied with current from a second inverter, of the two sets of three-phase windings, the first armature windings are composed of windings for U1 phase, V1 phase, and W1 phase, and the second armature windings are composed of windings for U2 phase, V2 phase, and W2 phase, the windings for U1 phase and U2 phase are stored in slots adjacent to each other, the windings for V1 phase and V2 phase are stored in slots adjacent to each other, the windings for W1 phase and W2 phase are stored in slots adjacent to each other, driving is performed such that phases of currents flowing in the two sets of three-phase windings (26-1,26-2) are different from each other by 20 degrees to 40 degrees in electric angle, characterized in that the rotor is composed of m stages of rotor component units(11a1-11a4:11b1,11b2:11c1,11c2) arranged in an axial direction, and the m stages of rotor component units(11a1-11a4: 11b1, 11b2: 11c1, 11c2) are skewed to have a stage-skew structure with a skew angle θ, unit: degree, wherein the m stages of rotor component units(11a1-11a4:11b1,11b2:11c1,11c2) each include rare-earth permanent magnets as the permanent magnets, the skew angle θ (unit: degree) between the adjacent units of the m stages of rotor component units (11a1-11a4:11b1,11b2:11c1,11c2) satisfies 30/m ≦ θ ≦ 43.2/m, m is an integer equal to or greater than 2, in electric angle, a number N of slots in the stator iron core and a number M of poles in the rotor satisfy N = 6M and 6 ≦ M ≦ 14 (N and M are integers), and a thickness of a core back of the stator iron core is not smaller than 4 mm and not greater than 7 mm.