To constitute magnetic paths around a cavity by impressing a heteropolar radial magnetic field having mutually-faced N-poles and S-poles upon the cavity, by respectively arranging three exciting coils on the upper and lower surfaces of a magnetic die and in the die.

After the lower punch of a magnetic die 10 is inserted into a cavity 14 by raising the punch 13 to a prescribed position and magnetic powder is packed in the cavity 14, a state where the magnetic power can be molded in a magnetic field is set by lowering the upper punch 12 of the die 10 into the cavity 14. Then required currents are made to flow to exciting coils 15, 16, and 17. When the currents flow to the coils 15, 16, and 17, the coil 15 arranged on the upper surface of the die 10 forms a magnetic path having its S-pole on the side face of the upper punch 12 and N-pole on the upper surface of the punch 12. The exciting coil 16 arranged in the die 10 forms a magnetic path having its S-pole on the upside and N-pole on the downside, and the coil 14 arranged on the lower surface of the die 10 forms a magnetic path having its N-pole on the side face of the lower punch 13 and S-pole on the upper surface of the punch 13. Thus, the magnetic paths are formed around the cavity 14 by using a radial magnetic field generated in the cavity 12 as a heteropolar two-pole magnetic field. Therefore, the magnetic powder can be oriented in the radial direction with a high magnetic field intensity.