A head supporting mechanism including a loading beam, a flexure and a head slider. The loading beam has a proximal portion, a distal portion and an intermediate portion defined between the proximal portion and the distal portion while at least partially overlapping with the head slider. A width of the intermediate portion is smaller than those of the head slider and the flexure. Accordingly, the flexure is exposed on opposite sides of the intermediate portion of the loading beam. When the head slider is attached to the flexure after the flexure has been mounted to the loading beam, a jig is disposed while bridging the intermediate portion of the loading beam to press the exposed part of the flexure. The distal portion and the intermediate portion have the same width and the same cross-sectional shape.