The balloon catheter (10) spans the catheter shaft (2), the balloon (3), and the inflation region (33) of the balloon (3), and has a distal end position (M1) on the distal side of the inflation region (33). A linear member (4) mounted on the catheter shaft (2) or the balloon (3) is provided at the proximal end position (M2) on the proximal end side with respect to the expansion region (33). The linear member (4) includes at least an outer portion disposed on the side opposite to the inner portion facing the expansion region (33) among the portions disposed along the outer peripheral surface of the expanded region (33) in the expanded state. It has a hard part (42) to be included, and a soft part (41) that is a part other than the hard part (42) and that can be stretched and has a lower hardness than the hard part. [Selection] Figure 7バルーンカテーテル（１０）は、カテーテルシャフト（２）、バルーン（３）、及び、バルーン（３）の膨張領域（３３）を跨いで、膨張領域（３３）よりも先端側の先端位置（Ｍ１）と、膨張領域（３３）よりも基端側の基端位置（Ｍ２）とで、カテーテルシャフト（２）又はバルーン（３）に装着される線状部材（４）を備える。線状部材（４）は、膨張した状態の膨張領域（３３）の外周面に沿って配置される部分のうち、膨張領域（３３）に対向する内側部分と反対側に配置する外側部分を少なくとも含む硬性部分（４２）と、硬性部分（４２）以外の部分であって、延伸可能で且つ硬性部分よりも硬さが低い軟性部分（４１）とを有する。【選択図】図７
