PURPOSE: To obtain a rotor in a PM type motor high in fixing force of a magnet to a yoke, by sticking a permanent magnet with projection covered with fluorine-containing resin to a grooved yoke.

CONSTITUTION: A magnet 1 is composed of rare earth or ferrous magnetic powder added with 3% of thermosetting resin and kneaded, moulded and cured which is then covered with 10μm of a fluorine-containing resin. A shaft 3 is driven into a grooved yoke 2 matched with the projections of the magnet 1. The epoxy resin adhesive is spread and inserted into the magnet 1, which is then cured for an hour at 150°C to obtain a rotor. Thus, a rare earth ferrous magnet covered with fluorine-containing resin thereby comes to be used as a magnet for rotor of a motor and a motor in low cost and with high performance will be made available.