rigid portion provided on the distal end side of the insertion portion (11), the hard portion and the ultrasonic probe for transmitting and receiving an ultrasonic signal in the (11) (21), enter the ultrasonic probe (21) a cable (27) for transmitting an electric signal output, interposed between the order to transmit electrical signals between the ultrasonic probe (21) and the cable (27), planar formed by laminating a plurality of layers including the wiring layer flexible part of, further comprising a partially insulating layer member (25), a rigid flexible substrate which forms part of the other as a rigid portion further comprising a hard layer (26) (24), has an ultrasonic probe (21) is connected to the rigid portion (26), at least a portion of the flexible portion (25) is spirally so as to surround the wiring connection portion of the cable (27) and the rigid flexible board (24) ultrasonic endoscope in which it is located.挿入部の先端側に設けられた硬質部(11)と、硬質部(11)に設けられた超音波信号を送受信する超音波プローブ(21)と、超音波プローブ(21)に入出力される電気信号を伝送するケーブル(27)と、電気信号を伝送するべく超音波プローブ(21)とケーブル(27)との間に介在し、配線層を含む複数の層を積層した面状部材の、一部を絶縁層をさらに含むフレキシブル部(25)、他の一部を硬質層をさらに含むリジッド部(26)として構成するリジッドフレキシブル基板(24)と、を有し、超音波プローブ(21)はリジッド部(26)に接続されており、フレキシブル部(25)の少なくとも一部は、ケーブル(27)とリジッドフレキシブル基板(24)との配線接続部を包囲するように螺旋状に配置されている超音波内視鏡。
