Rotor for reluctance type rotating machine

A rotor for a reluctance type rotating machine includes a rotor core (2, 26, 28, 39, 42) formed by stacking a number of annular core materials each of which includes magnetic concave and convex portions (8, 15, 35, 9, 16, 36) alternately formed on an outer circumference thereof and a central through hole, the rotor core having a key (10, 11) axially extending on an outer circumference thereof, and a rotational shaft (19) inserted through the central hole of the rotor core, the shaft having a key groove (21) engaging the key (10, 11) of the rotor core (2, 26, 28, 39, 42), characterized in that the rotor core (2, 26, 28, 39, 42) is divided into a plurality of blocks (3, 4, 27, 29-31, 41, 43, 44), and the core materials constituting at least one block have the magnetic concave and convex portions (8, 15, 35, 9, 16, 36) shifted by a predetermined angle relative to the core materials constituting the other or another block on the basis of a center line passing the key (10, 11).