A head suspension assembly includes a magnetic head slider with at least one
thin-film
magnetic head element, a support member for supporting the magnetic head slider
at a top end portion thereof, a drive circuit electrically connected to the at
least one thin-film magnetic head element, and at least two diode elements connected
toward one direction in parallel with terminals which are connected across the
at least one thin-film magnetic head element. Each of the diode elements has a
turn-on voltage higher than the maximum output voltage of the at least one thin-film
magnetic head element.