PROBLEM TO BE SOLVED: To provide a baloon catheter capable of providing an area where a pharmaceutical is favorably retained, as wide as possible in a comprehensive manner and reducing the outside diameter of a balloon in deflation, and a manufacture method therefor, and a treatment method.SOLUTION: A balloon catheter 10, in which a pharmaceutical is provided on an external surface of a baloon, includes a long catheter body 20, and a balloon 30 provided on an outer peripheral surface of the catheter body 20 and being inflatable/deflatable. The balloon 30 includes a plurality of vanes 32 that are folded back in the deflated state such that the external surface sides are projected, while inner surfaces come into contact with each other, where two adjacent vanes 32 in the deflated state, are folded back in a direction facing each other and disposed at circumferentially different position without being overlapped with each other in the circumferential direction.SELECTED DRAWING: Figure 3【課題】薬剤を良好に維持できる範囲を、できるだけまとまった広い範囲で設けることができ、かつ収縮時のバルーンの外径を小さくできるバルーンカテーテルおよびその製造方法並びに処置方法を提供する。【解決手段】薬剤がバルーンの外表面に設けられるバルーンカテーテル１０であって、長尺なカテーテル本体２０と、カテーテル本体２０の外周面に設けられて拡張および収縮が可能なバルーン３０と、を有し、バルーン３０は、収縮した状態において内表面同士が接触しつつ外表面側が突出するように折り返されている複数の羽根３２を有し、隣接する２つの羽根３２は、収縮した状態において向かい合う方向へ折り畳まれており、周方向において重なることなく周方向の異なる位置に配置されている。【選択図】図３
