An endoscope 10 having an insertion portion 11 that is long, the endoscope system 1 of the present invention, an elongated and inserted into the channel of the insertion portion 11 of the inner view mirror 10, a flexible a medical device 50 with a sheath 52, the two rollers, the outer diameter greater than the distance of the roller surface between the rollers of the two, the sheath 52 of the medical device 50 is inserted through the rollers of the two state, it is characterized by having a frictional resistance increasing means for increasing the frictional resistance between the outer peripheral surface in contact with the roller surface of each.本発明の内視鏡システム1は、長尺な挿入部11を備えた内視鏡10と、該内視鏡10の上記挿入部11のチャンネル内に挿通し、可撓性を有する長尺なシース52を備えた医療器具50と、2つのローラによって、該医療器具50の上記シース52は、その外径が上記2つのローラのローラ面間の距離よりも大きく、上記2つのローラに挿通した状態で、夫々の上記ローラ面と接触する外周面との摩擦抵抗を増大する摩擦抵抗増大手段を有することを特徴とする。
