A method of making a magnetic head having an air bearing surface (ABS) composed of a flat and smooth worked surface and having a reduced step produced between a rail portion on the ABS and an element portion. Steps of the method include forming an electromagnetic transducing element including an insulating layer on a board, and then removing only a specific plane of the board opposed to a magnetic recording medium up to a first predetermined depth. Forming an insulating film composed of the same material as that of the element insulating layer on the surface of the board after the removal. Polishing the surface of the element portion and then the insulating film is polished by a chemical mechanical polishing method till the element is exposed. Then forming a recessed portion having a second predetermined depth on the insulating film.