A thermally assisted magnetic head includes a slider, the slider includes a slider substrate and a magnetic head part. The magnetic head part includes a recording head, a reading head, a near field transducer and a medium-opposing surface. The medium-opposing surface includes a recording area and a reading area. The magnetic head part includes a record/read separately protective structure which a stabilized protective film is formed on the recording area and a reading head protective film is formed on the reading area. The stabilized protective film includes a three-layers structure which a seed layer and a double protective layer are laminated. The double protective layer includes a YSZ protective layer and a hard protective layer. The reading head protective film includes a thickness which is thinner than the stabilized protective film.