A head apparatus includes a head that records information into and reproduces the information from a disc, a slider that supports the head, and flies above a surface of the disc when the disc rotates, the slider having a medium opposing surface that opposes to the disc, a positive pressure part that is formed on the medium opposing surface of the slider, generates a lifting power used to float the slider in cooperation with an airflow formed as the disc rotates, and defines a pitch angle of the slider, and a negative pressure part that is formed on the medium opposing surface of the slider, and decreases a flying height of the slider in cooperation with the airflow, wherein (E/L).times.100.gtoreq.6 is met, where L is a length of the medium opposing surface along a direction from an inflow end to an outflow end of the airflow, and E is the shortest distance between the positive pressure part and the negative pressure part along the direction from the inflow end to the outflow.

 
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