A balloon catheter has a first shaft that includes a first lumen, and that extends in an axial direction, a first balloon disposed on a distal side of the first shaft, and capable of being expanded and contracted in a radial direction, a second shaft that includes a second lumen, and that extends in the axial direction, and a second balloon disposed on a distal side of the second shaft so as to cover an outer periphery of the first balloon, and that is capable of being expanded and contracted in the radial direction. The first shaft is configured to be movable in the axial direction relative to the second shaft, and the first balloon is configured to be movable in the axial direction relative to the second balloon in response to movement of the first shaft.
