PROBLEM TO BE SOLVED: To improve the accuracy of the inspection result of a tube wall of a long member constituting a catheter shaft and to further improve the product quality through the inspection, and a balloon catheter length used for the balloon catheter. A method for manufacturing a length member is provided. An inner tube 210 included in a balloon catheter 1 has at least a transparent region 252 having high transparency near a proximal end opening 213a, and the transparent region is a base of a balloon 10 in an axial direction of an outer tube 310. The guide wire lumen 215 is provided on the proximal side of the end and on the distal side of the proximal end of the guide wire lumen 215. [Selection diagram] Figure 2【課題】カテーテルシャフトを構成する長尺部材の管壁の検査結果の精度を高めるとともに当該検査を通じて製品品質のより一層の向上が図られ得るバルーンカテーテル、および当該バルーンカテーテルに用いられるバルーンカテーテル用長尺部材の製造方法を提供する。【解決手段】バルーンカテーテル１が備える内管２１０は、基端開口部２１３ａ付近において、透明性が高い透明領域２５２を少なくとも有し、透明領域は、外管３１０の軸方向において、バルーン１０の基端よりも基端側、かつ、ガイドワイヤルーメン２１５の基端よりも先端側に設けられる。【選択図】図２
