It is attached to the insertion portion having a curved portion endoscope is provided, the endoscope cleaning sheath is provided with a flexible tube body having a through hole plurality of parallel to the longitudinal axis, the distal end of the flexible tube body the observation window, comprises spraying at least one of gas or liquid, and a tip of the nozzle cylindrical least provided is, the insertion portion distal end portion of an endoscope, through hole, the insertion portion of the endoscope an endoscope insertion section hole to be inserted, and is supplying the second fluid conduit and a liquid supply first fluid conduit gas at least to within the second fluid conduit and the first fluid conduit It is provided at a position in a direction different from the bending direction of the curved portion having an insert portion which is placed through the endoscope insertion hole portion.内視鏡洗浄シースは、内視鏡が備える湾曲部を有する挿入部に装着され、長手軸に平行な複数の貫通孔を備える可撓性チューブ体と、可撓性チューブ体の先端部に設けられる、内視鏡の挿入部先端部に設けられた少なくとも観察窓に、気体又は液体の少なくとも一方を吹き付ける、筒状の先端ノズルと、を具備し、貫通孔は、内視鏡の挿入部が挿通される内視鏡挿入部用孔と、少なくとも気体を供給する第1流体管路及び液体を供給する第2流体管路とであり、第1流体管路及び第2流体管路を、内視鏡挿入部用孔に挿通配置された挿入部の有する湾曲部の湾曲方向とは異なる方向の位置に設けられている。
