PROBLEM TO BE SOLVED: To provide an ultrasonic endoscope that includes a relay board for connecting an ultrasonic signal conductor divided halfway in a video connector, and is excellent in a degree of freedom and assemblability of the composition and arrangement of the relay board.SOLUTION: An ultrasonic endoscope includes an imaging part and an ultrasonic probe at the tip of an insertion part, a video connector at the tip of a flexible tube extending from an operation part, and a connector for an ultrasonic signal at the tip of a branch tube branching from the video connector and extending. A first ultrasonic signal conductor passing through the inside of the flexible tube and a second ultrasonic signal conductor passing through the inside of the branch tube are connected to each other by a relay board, and an ultrasonic signal is transmitted between the ultrasonic probe and the connector for an ultrasonic signal. The video connector includes a first support frame to which the tip of the flexible tube is connected, and through which an imaging signal conductor and the first ultrasonic signal conductor pass, and a second support frame to which the tip of the branch tube and the end part on the opposite side are connected, and supports the relay board inside the second support frame.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】途中で分断される超音波用信号導線を接続する中継基板をビデオコネクタ内に備え、中継基板の構成や配置の自由度や組み立て性に優れる超音波内視鏡を提供する。【解決手段】挿入部の先端に撮像部と超音波用プローブを備え、操作部から延出される可撓性チューブの先端にビデオコネクタを備え、ビデオコネクタから分岐して延出する分岐チューブの先端に超音波信号用コネクタを備える。可撓性チューブ内を通る第1の超音波用信号導線と分岐チューブ内を通る第2の超音波用信号導線を中継基板で接続して超音波プローブと超音波信号用コネクタの間で超音波用信号を伝送する。ビデオコネクタは、可撓性チューブの先端が接続して撮像用信号導線と第1の超音波用信号導線が内部を通る第1の支持枠と、分岐チューブの先端と反対側の端部が接続する第2の支持枠とを備え、第2の支持枠の内部に中継基板を支持する。【選択図】図4
