PROBLEM TO BE SOLVED: To provide a balloon catheter capable of effectively delivering a medicament to a biological tissue, and adjusting the delivering property, and a production method and a treatment method therefor.SOLUTION: There is provided a catheter in which long bodies 42 which are crystals of a water-insoluble medicament, are provided on an outer face of a balloon 30, in which the long bodies 42 respectively comprise a core part 43 provided inside of the long body 42, and an outer shell 44 provided on the surrounding of the core part 43 and having a physical feature different from that of the core part 43.SELECTED DRAWING: Figure 4【課題】薬剤を生体組織へ効果的に送達でき、かつ送達性を調節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】水不溶性薬剤の薬剤結晶である長尺体４２がバルーン３０の外表面に設けられるカテーテルであって長尺体４２は、当該長尺体４２の内部に位置する芯部４３と、芯部４３の周囲に位置し、芯部４３と異なる物理的性状を備える外殻４４とを有する。【選択図】図４
