To attain a high motor efficiency by reducing harmonic secondary copper loss generated at a rotor.

This rotator is a columnar rotator 3 and, on a peripheral surface portion thereof, a plurality of rotator slots 31a extending in a direction of a rotational axis J are drilled at predetermined intervals. In each of the rotor slots 31a, at least one conductor rod 33 is embedded. One end of the conductor rod 33 is formed with a predetermined quantity of rotator slots 31a in a peripheral direction of the rotator 3 and is connected with one end of at least one other conductor rod 33 so as to be energized. The other end of the conductor rod 33 is connected with the other end of at least one other conductor rod 33 so as to be energized.