Balloon for balloon catheter

A balloon for a balloon catheter, comprising:

• a balloon body having an outer surface and an inner surface, wherein
• the balloon body has a straight tubular part, a distal tapered part located distal to the straight tubular part, and a proximal tapered part located proximal to the straight tubular part, and the balloon satisfies at least one of the following (1) and (2):
• (1) in a longitudinal axis direction of the balloon body, the distal tapered part has a first part having an inner protrusion part that projects radially inwardly from an inner surface of the balloon body and extends in the longitudinal axis direction of the balloon body, and a second part that is the entire section excluding the first part and does not have the inner protrusion part;
• and
• the distal tapered part has an outer protrusion part that projects radially outwardly from an outer surface of the balloon body and extends in the longitudinal axis direction of the balloon body in the entire extent of the second part, and
• (2) in the longitudinal axis direction of the balloon body, the proximal tapered part has a first part having an inner protrusion part that projects radially inwardly from an inner surface of the balloon body and extends in the longitudinal axis direction of the balloon body, and a second part that is the entire section excluding the first part and does not have the inner protrusion part;
• and
• the proximal tapered part has an outer protrusion part that projects radially outwardly from an outer surface of the balloon body and extends in the longitudinal axis direction of the balloon body in the entire extent of the second part.