A thin film magnetic head includes a slider that floats from a surface of a recording medium by an airflow generated on the surface of the recording medium to be rotated, and a thin film magnetic head element structure that is formed on an air discharging end face of the slider. A thermal plastic deformation portion is provided in the vicinity of the air discharging end face on a back surface of a recording medium facing surface of a slider so that a part of the thin film magnetic head element structure is further spaced from the surface of the recording medium than the recording medium facing surface of the slider.