PROBLEM TO BE SOLVED: To provide a blade tube that can freely set a length and a position of regions with different flexibility.SOLUTION: A blade tube has a multi-layer structure in which at least one layer is a reinforcement layer that is formed by braiding multiple element wires. The reinforcement layer includes: an altered part in which the element wires have been subjected to irradiation treatment with external energy and have been altered; and a non-altered part in which the element wires have not been subjected to the treatment. The altered part and the non-altered part are alternately positioned along an axial direction of the blade tube.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】可撓性の異なる領域の長さや位置を自由に設定できるブレードチューブを提供する。【解決手段】少なくとも1つの層が複数の素線を編組した補強層である複層構造のブレードチューブであって、前記補強層は、前記素線が外部エネルギーの照射処理を施されて変質している変質部分と、前記素線が前記処理を施されていない非変質部分と、を有し、前記変質部分と前記非変質部分とが前記ブレードチューブの軸方向に沿って交互に位置している。【選択図】図2