To provide a novel backing material having good attenuation of ultrasound, good processability, good thermal conductivity, and good aging resistance.SOLUTION: The backing material for an ultrasonic probe is substantially composed of porous amorphous carbon.SELECTED DRAWING: None【課題】超音波の良好な減衰性、良好な加工性、良好な熱伝導性、及び良好な耐経年劣化性を兼ね備えた新規なバッキング材を提供する。【解決手段】本発明の超音波探触子用バッキング材は、多孔質アモルファス炭素から実質的に成る。【選択図】なし