Abstract: A flying magnetic head composed of a first core and a second core bonded to each other with glass, having a pair of slide rails extending longitudinally on both lateral sides of the head; a gap defined on at least one of the slide rails by the first core and the second core and extending laterally; and a pair of recesses filled with glass and located on both lateral sides of the gap, thereby determining a track width of the gap. Because the magnetic gap is in coplanar with the surface of one of the slide rails, the flying magnetic head has excellent CSS characteristics. Also, it can be produced by assembling core blocks and cutting them into each piece and machining without restoring to complicated steps.