A permanent magnet electric motor 100 is provided with a rotor 2 and a rotational position detection sensor 7 for detecting the rotational position of the rotor 2. The rotor 2 is provided with a rotating shaft 4, an annular ferrite magnet 2c arranged on the outer circumferential surface of the rotating shaft 4, and a rare-earth magnet 2b arranged on the outer circumferential surface of the ferrite magnet 2c. The length from the center of the ferrite magnet 2c in the axial direction of the ferrite magnet 2c to the axial end surface of the ferrite magnet 2c on the rotational position detection sensor 7 side of the ferrite magnet 2c is longer than the length from the center of the rare-earth magnet 2b in the axial direction of the rare-earth magnet 2b to the axial end surface of the rare-earth magnet 2b on the rotational position detection sensor 7 side.
