Abstract: A motor of the permanent magnet rotor type is disclosed which is capable of permitting the rotor to be constantly stopped at a position of allowing the rotor to be started without employing any specific magnet arrangement. The motor is constructed in a manner such that a gap G.sub.1 between the pole face of each of main poles of a stator and each of magnetic poles of the rotor is formed to gradually increase in width, and a gap G.sub.2 between the pole face of each of complementary poles of the stator and each of the magnetic poles is formed to have the substantially same width as the maximum width of the gap G.sub.1.