PURPOSE: To make efficient the winding work and to increase the output efficiency of the cartridge, by taking construction that the yoke bridging the magnetic core members is made separately and the contact area is taken greater by inserting it in the gap of magnetic core member.

CONSTITUTION: In the magnetic circuit 15, four sets of magnetic core members 17a∼17d having the coils 16a∼16d are provided to a given location of the cartridge main body, the two yoke members 18a, 18b which are separated from the members 17a∼17d are inserted between a pair of members 17a∼17b and 17c∼17d respectively opposing with a gap, and they are contacted with the inside surface of the members 17a∼17d with crossing with a right angle. The magnetic piece 19 is supported at the inside center near the tip of the members 17a∼17d in shaking free with the rubber damper 20. The base of the canti-level 22 providing the reproduction stylus 21 is fitted to the tip of the magnet piece 19. The coils 16a∼16d are formed with insulation treatment of members 17a∼17d as a single body and electric wires are wound on them directly. Thus, winding work is easy, excellent in the productivity and the yield rate can be increased.