Flying head slider and information recording and/or reproduction apparatus

A flying head slider is disclosed which can fly stably above the surface of a recording medium and thereby prevent deterioration of a reproduction signal output of the head. The flying head slider has a head for recording and reproducing information onto and from a recording medium and has an air bearing portion at an opposing portion thereof which opposes to the recording medium. The flying head slider is acted upon by buoyancy by air bearing caused by dynamic pressure between the air bearing portion and a surface of the recording medium. The flying head slider is disposed with respect to the recording medium such that, within a flying region of the flying head slider in a radial direction of the information recording medium between an inner circumference position and an outer circumference position of the surface of the recording medium, a flying pitch angle equal to or greater than 120 rad is formed between the air bearing portion and the surface of the recording medium.