PURPOSE: To prevent the disconnecting when a cap type core is put on by a method wherein the lead-out wire of a winding is connected to a terminal passing through the wiring recessed part on the side face of a terminal board and the wiring groove located on the rear surface of the terminal board.

CONSTITUTION: A coil lead 11 is connected to a terminal 8 through a wiring recess 12, which is sunken to the degree of diameter or thereabout of the lower flange of a drum type core 9 on the opposing side faces having no terminals 8 of a terminal board 7, and the resin 12 located on the rear surface of the terminal board 7, and the terminal 8. As the wiring recess 12 is sunken to the extent of the diameter of the drum type core 9, the coil lead 11 can be drawn out almost in vertical direction fro the lower flange of the drum type core 9. A cap type core 14 is covered on the upper part of the drum type core 9, but no disconnection due to push by the cap type core 14 of the coil lead 11 occurs. As a result, the disconnection due to push by the cap type core can be prevented.