A magnetic head assembly equipped with a slider and a gimbal spring to which the slider is secured with an adhesive agent. According to one aspect, at least one slit is formed in the gimbal spring opposing the adhesion surface of the slider, so that expansion and contraction of the gimbal spring caused by a change in the temperature is hardly transferred to the slider. According to a second aspect, the Young's modulus after hardening of the adhesive agent applied onto the adhesion surface of the slider is selected to be smaller than about {fraction (1/13000)} of the Young's modulus of the slider material or of the gimbal spring material. According to the first aspect, therefore, the area of the gimbal spring on which the adhesive agent is applied is limited by the slit. According to the second aspect, the Young's modulus of the adhesive agent after hardening is so small that the warping amount of the slider caused by a change in the temperature lies within a predetermined range. The warping amount of the slider in the magnetic head assembly is hence suppressed to lie within an allowable range despite a change in the temperature, and floating performance of the slider is stabilized.