The endoscope cleaning sheath includes a sheath body, and the distal side fixing portion fixed to the distal end of the sheath body, the proximal end side fixing part to the base end is fixed in the sheath body. The endoscope cleaning sheath, fixed to the distal end is the distal-side fixing part at the tip side of the connecting position, a linear portion is proximal at the proximal end side connection position is secured to the proximal-side fixed portion, extends along a line core shaft between the proximal end side connection position to the distal end side connection position, the tensile strength in the direction parallel to the longitudinal axis with a high linear portion from the sheath body.内視鏡洗浄シースは、シース本体と、前記シース本体の先端部に固定される先端側固定部と、前記シース本体の基端部に固定される基端側固定部と、を備える。前記内視鏡洗浄シースは、先端側接続位置で先端が前記先端側固定部に固定され、基端側接続位置で基端が前記基端側固定部に固定される線状部であって、前記先端側接続位置と前記基端側接続位置との間で線芯軸に沿って延設され、前記長手軸に平行な方向についての引張り強度が前記シース本体より高い線状部を備える。
