PROBLEM TO BE SOLVED: To provide an ultrasound probe and an ultrasound diagnostic apparatus capable of increasing both the heat dissipation performance and the ultrasound damping performance.SOLUTION: The ultrasound probe includes: a piezoelectric element used for transmitting and receiving ultrasound waves； a signal electrode disposed on a rear surface of the piezoelectric element； and a backing disposed to a rear surface side of the signal electrode. The backing has a thermal resistance of 8 K/W or less, and the backing damps an ultrasound wave of the lowest frequency by 10 dB or more, among frequencies at which the transmission and reception sensitivity of the ultrasound probe is decreased by 20 dB from its maximum value.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】放熱性および超音波の減衰性を共に高めることができる、超音波探触子および超音波診断装置を提供すること。【解決手段】超音波の送受信をするための圧電素子と、前記圧電素子の背面側に配置された信号電極と、前記信号電極の背面側に配置されたバッキングと、を有する超音波探触子であって、前記バッキングは、８Ｋ／Ｗ以下の熱抵抗を有し、前記バッキングは、前記超音波探触子の送受信感度がその最大値から２０ｄＢ低下する周波数のうち、最も低い周波数の超音波を、１０ｄＢ以上減衰させる。【選択図】図２
