PROBLEM TO BE SOLVED: To provide a slave endoscope in a parent-child endoscope system in which a direction around the axis of an insertion part inserted into a treatment instrument insertion channel of a master endoscope can be visually recognized by an X-ray image during contrast examination under fluoroscopy so that a direction that a curved part can curve can be easily discriminated.SOLUTION: A slave endoscope 2 in a parent-child endoscope system 40 includes: an insertion part 10 that is freely inserted into and removed from a treatment instrument insertion channel 8 of a master endoscope 1 a curved part 17 arranged on a leading end side of the insertion part 10 that can be freely curved in a predetermined direction and an X-ray non-transmission marker 60 for discriminating the curvature direction of the curved part 17 by being provided to the curved part 17 and displayed in an X-ray image.COPYRIGHT: (C)2015,JPO&INPIT【課題】 X線透視下造影検査時のX線画像によって、親内視鏡の処置具挿通チャンネルに挿入された挿入部の軸回り方向を視認できるようにして、湾曲部が湾曲できる方向を容易に判別できるようにした親子式内視鏡システムにおける子内視鏡の提供。【解決手段】 親子式内視鏡システム40における子内視鏡2は、親内視鏡1の処置具挿通チャンネル8に挿抜自在な挿入部10と、挿入部10の先端側に配設され、所定方向に湾曲自在な湾曲部17と、湾曲部17に設けられてX線画像に表示されることで、湾曲部17の湾曲方向を判別するためのX線不透過マーカ60と、を具備する。【選択図】図7
