PROBLEM TO BE SOLVED: To provide an ultrasonic probe capable of efficiently releasing the heat emitted by an ultrasonic transducer, and an ultrasonic diagnostic device.SOLUTION: An ultrasonic probe comprises: an ultrasonic transducer 100 an FPC (wiring member) 120 electrically connected to the ultrasonic transducer 100 and arranged along a side face in a longitudinal direction of the ultrasonic probe 100 a shield 223 bonded to outside of the FPC 120 when viewed from the ultrasonic probe 100 so as to electrically protect the ultrasonic transducer 100 a first heat conduction member 301 installed between the FPC 120 and the ultrasonic transducer 100 and installed being contacted with the ultrasonic transducer 100 a second conduction member 302 installed outside of the shield 223 being contacted with the shield 223 and a connection member 303 thermally connecting the first conduction member 301 with the second conduction member 302.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2019,JPO&INPIT【課題】超音波振動子が発する熱を効率よく逃がす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。【解決手段】超音波振動子100と、超音波振動子100と電気的に接続され、超音波振動子100の長軸方向における側面に沿って設けられたFPC(配線部材)120と、超音波振動子100から見たFPC120の外側に接着され、超音波振動子100を電気的に保護するシールド223と、FPC120と超音波振動子100との間に設けられ、超音波振動子100と接触して設けられた第1熱伝導部材301と、シールド223の外側にシールド223と接触して設けられた第2熱伝導部材302と、第1熱伝導部材301と第2熱伝導部材302とを熱的に接続する接続部材303と、を有する。【選択図】図7