To provide a highly efficient permanent magnet motor by increasing its torque and reducing the magnetic leakage flux from the ends of the rotor.

A rotor 10 is put inside the stator 1 which forms the rotating magnetic field. Rectangular cross-section permanent magnets 3, 4 are buried round with the same spacing using their longer side as the magnetic poles, and the neighboring magnets 3, 4 have opposite polarities each other. Holes 11, 12 are made between the shaft 5 and the magnets 3, 4 at the axial ends of the rotor in order to increase the magnetic reluctance at the rotor ends. The holes 11 are made rectangular near on the center line of the magnets 3, 4, and the holes 12 are L-shaped near the ends of the neighboring magnets 3, 4.