A rotor includes a rotor core having a plurality of pairs of magnet-receiving holes and a plurality of magnets respectively received in the magnet-receiving holes. Each pair of the magnet-receiving holes is arranged in a substantially V-shape that opens toward a stator side. The rotor core also has a plurality of q-axis core portions through which q-axis magnetic flux flows, a plurality of first magnetic flux barriers and a plurality of second magnetic flux barriers. Further, in the rotor core, the following dimensional relationships are satisfied: W2≧W1; and W3≧W1, where W1 is a width between centerlines L1 of the q-axis core portions and the corresponding first magnetic flux barriers, W2 is a width between the centerlines L1 and the corresponding second magnetic flux barriers, and W3 is a radial width between a radially inner surface of the rotor core and the second magnetic flux barriers.