PROBLEM TO BE SOLVED: To provide a medical long body in which joint strength between a tube body and a distal end member is enhanced and a balloon catheter in which joint strength between a tube body and a distal end member is enhanced.SOLUTION: A material forming an inner layer 120 of a tube body 110 provided to a medical long body 1 has higher fusion property with a material forming a distal end member 140 than a material forming an outer layer 130 of the tube body, and the inner layer is interposed between the distal end member and the outer layer at a joint portion 150.SELECTED DRAWING: Figure 2【課題】チューブ体と先端部材の接合強度が高められた医療用長尺体、およびチューブ体と先端部材の接合強度が高められたバルーンカテーテルを提供する。【解決手段】医療用長尺体１が備えるチューブ体１１０の内層１２０を形成する材料は、チューブ体の外層１３０を形成する材料よりも、先端部材１４０を形成する材料との融着性が高く、また内層は、接合部１５０において、先端部材及び外層の間に介入している。【選択図】図２
