Balloon catheter

A balloon catheter comprising:

• a balloon;
• and
• an inner shaft joined to the balloon, the inner shaft comprising:
• an inner layer;
• a coil body arranged on an outer periphery of the inner layer and having a sparsely wound portion in which gaps are formed between adjacent windings of a wire forming the coil body;
• a marker member arranged on an outer periphery of the coil body at the sparsely wound portion without contacting the inner layer along an entire length of the marker member and having a distal end part and a proximal end part, and
• an outer layer covering the coil body and the marker member, wherein:
• at least one of the gaps forms a void such that the outer layer is not disposed in the void,
• at least one of the distal end part and the proximal end part of the marker member is arranged at a position facing the void without contacting the inner layer, and
• at least one of a distal end surface and a proximal end surface of the marker member extends along a winding direction of the wire forming the coil body.