A permanent magnet motor (1) is configured such that mN≠K is satisfied to an integer m, where the pole number of a rotor (3) is K and the number of divided iron cores (10-12) of a stator (2) is N, and N values of r(θ), r(θ+360°/N), . . . , r(θ+(i−1)×360°/N), . . . , r(θ+(N−1)×360°/N) are equal so that the absolute value of the difference between any two of the N values becomes up to a predetermined value, where r(θ) is an inner radius defined as, on a plane perpendicular to a rotary shaft (7) of the rotor (3), a distance from the rotary shaft (7) center to a surface of the stator iron core (4) facing the rotor (3) where an angle from a fitting portion (15) of the partial iron core (10) is θ on the perpendicular plane, θ taking 0 to 360°/N.