PURPOSE: To prevent a detection level of a tracking reference signal from becoming an inadequate value by forming an electrode edge with a prescribed width to a position close to a magnetic gap at the end of an electrode for detecting a change in a static capacitance at a sliding face of the thin film.

CONSTITUTION: One outer side face is polished and processed by two face sides A, B in contact with said outer face so that an electrode edge 9a with a prescribed width in an outer side face of the reinforced base 3 of an electrode 9 for detecting a change in a static capacitance is formed to the edge of a slide face 10 of the thin film made of a conductive substance for the electrode to detect a change in the static capacitance formed to one of outer side faces not crossed in a prolonged direction of the magnetic air gap 2, in a magnetic head with the constitution that the slide face 10 is provided with the magnetic air gap 2 and the magnetic path consisting of the thin film 1 made of a ferromagnetic material placed near at least a part in contact with the magnetic recording medium is clipped by reinforced bases 3, 4 made of a high hardness material having wear resistance.