PROBLEM TO BE SOLVED: To provide an endoscope system 1 capable of efficiently performing power transmission without spoiling flexibility of an endoscope insertion part 11 of a soft endoscope 10.SOLUTION: An endoscope system 1 comprises a soft endoscope 10 and treatment instrument 20. The soft endoscope 10 includes: an endoscope insertion part 11 a flexible channel 14 inserted into the endoscope insertion part 11 and a flexible power transmission electrode 18 which is arranged in the endoscope insertion part 11 and generates an AC electric field applied to the channel 14. The treatment instrument 20 includes: a flexible treatment instrument insertion part 21B a flexible power reception electrode 28 which is arranged in the treatment instrument insertion part 21B, and receives the AC electric field when being inserted into the channel 14 and a treatment part 22 for performing processing using power received by the power reception electrode 28.COPYRIGHT: (C)2015,JPO&INPIT【課題】軟性内視鏡10の内視鏡挿入部11の可撓性を損なうことなく、効率良く電力伝送できる内視鏡システム1を提供する。【解決手段】内視鏡システム1は、軟性内視鏡10と処置具20とを具備し、軟性内視鏡10が、内視鏡挿入部11と、内視鏡挿入部11を挿通する可撓性のチャンネル14と、内視鏡挿入部11に配設されチャンネル14に印加される交流電界を発生する可撓性の送電電極18と、を有し、処置具20が、可撓性の処置具挿入部21Bと、処置具挿入部21Bに配設されチャンネル14に挿入されると交流電界を受電する可撓性の受電電極28と、受電電極28が受電した電力により処理を行う処置部22と、を有する。【選択図】図6A