PROBLEM TO BE SOLVED: To efficiently supply a cleaning liquid without providing a special flow channel in supplying the cleaning liquid through a mantle tube, and to facilitate insertion of an endoscope insertion part into the mantle tube.SOLUTION: There is provided an endoscope system that includes: the mantle tube into which the insertion part of an endoscope is inserted a fluid flow channel formed of a space between an outer surface of the endoscope inserted into the mantle tube and an inner surface of the mantle tube a sealing member which seals the fluid flow channel and a pipe line formed inside the insertion part to communicate between the fluid flow channel and a nozzle formed on a leading end surface of the insertion part and to supply a fluid from the fluid flow channel to the nozzle and further includes a first fixing means for fixing the insertion part at a position where the leading end of the insertion part is not exposed to the outside from the leading end of the mantle tube.COPYRIGHT: (C)2012,JPO&INPIT【課題】外套管により洗浄液を供給する際、特別な流路を設けることなく、効率よく洗浄液を供給することができるとともに、外套管への内視鏡挿入部の挿入を容易とする。【解決手段】内視鏡の挿入部が挿入される外套管と、前記外套管内に挿入された内視鏡の外面と外套管の内面との間の隙間により形成される流体流路と、前記流体流路を封止する封止部材と、前記流体流路と前記挿入部の先端面に形成されたノズルとを連通し、前記流体流路から前記ノズルに流体を供給するように前記挿入部内に形成された管路とを備え、また、さらに、前記挿入部の先端が前記外套管の先端より露出しない位置で、前記挿入部を固定する第1の固定手段を備えた内視鏡システムを提供することにより前記課題を解決する。【選択図】図6
