Acoustic braking component 21 of this invention has the acoustic braking body 211 which is formed with the high polymer materials, acoustic braking body 211, as acoustic impedance is adjusted in the high polymer materials, is something which includes the plural metal make fibrous conductors 212 which specified functioning it does unidirectionally extend as a lead wire. In addition, after production method of acoustic braking component 21 of this invention on the aforementioned principal plane of the baseplate which on the one hand formed the plural growth nuclei in the principal plane, applies the resin of a flow state where the conductor of the powder body of the metal make is mixed, impressing the magnetic field in normal direction of the aforementioned principal plane, it is something which hardens the resin of aforementioned flow condition body. According to this constitution, while unevenness of acoustic braking body 21 being decreased, it can prepare for acoustic braking body 21 the conductor line. In addition, the ultrasonic probe and the ultrasonic diagnostic device of this invention are something which has this kind of acoustic braking component 21.本発明の音響制動部材21は、高分子材料で構成された音響制動体211を備え、音響制動体211は、高分子材料中に、音響インピーダンスを調整するとともにリード線として機能する所定の一方向に延びた複数の金属製繊維状導体212を含むものである。また、本発明の音響制動部材21の製造方法は、一方主面に複数の成長核を形成した基板の前記主面上に、金属製の粉体の導体を混合した流動状態の樹脂を塗布し、前記主面の法線方向に磁界を印加した後に、前記流動状体の樹脂を硬化するものである。この構成によれば、音響制動体21のムラが低減されつつ導体線が音響制動体21に備えられる。また、本発明の超音波探触子および超音波診断装置は、このような音響制動部材21を備えるものである。
