PROBLEM TO BE SOLVED: To provide an ultrasonic transducer in which difficulty of connection between an electrode lead connected to a piezoelectric body in the ultrasonic transducer and an electronic circuit in a relay substrate is avoided and thereby electric signals are surely transmitted and received to and from a piezoelectric element.SOLUTION: In the ultrasonic transducer, a flexible linear wiring lead is disposed to the side face of the plurality of two-dimensionally arrayed piezoelectric bodies and is conducted to the electrodes of the piezoelectric bodies, and the wiring lead is connected to the electronic circuit for transmitting and receiving the electric signals to and from the piezoelectric bodies.COPYRIGHT: (C)2010,JPO&INPIT【課題】超音波トランスデューサにおける圧電体に接続された電極リードと、中継基板における電子回路との接続が困難となる事態を回避し、圧電素子への電気信号の送受信を確実に行うことが可能な超音波トランスデューサを提供する。【解決手段】超音波トランスデューサにおいて、2次元的に配列された複数の圧電体の側面に、可撓性を有する線状の配線リードを配置して当該圧電体の電極と導通させ、さらに当該配線リードを、圧電体と電気信号の送受信を行う電子回路に接続する。【選択図】図2