According to one embodiment, a head gimbal assembly includes a support plate, a wiring member including a thin metallic plate, an insulating layer and a conductive layer, the wiring member including a tongue portion located on a convex portion of the support plate, a proximal end portion fixed onto the support plate, and a bridge portion bridged between the tongue portion and the proximal end portion and including a inflection point with respect to a height direction of warping, a magnetic head attached to the tongue portion, and a piezoelectric element bonded to the bridge portion at a section between the proximal end portion and the inflection point.