Balloon for catheter and balloon catheter

A balloon catheter, comprising:

• an inner tube having a first lumen opened at a distal end thereof;
• an outer tube coaxially provided with said inner tube, having a distal end distanced from the distal end of said inner tube toward a proximal end at a given length, and having a second lumen between the outer surface of said inner tube and the outer tube;
• a hub having an opening communicating with said second lumen;
• and
• a balloon fixed to said inner tube at a distal end thereof, fixed to said outer tube at a proximal end thereof, and communicating in the inside thereof with said second lumen, wherein a fluid is charged or discharged from said opening to inflate or deflate said balloon,
• wherein the balloon comprises a film body, wherein said film body includes a hard layer containing a polyamide and a flexible layer formed on the hard layer and containing a polyamide elastomer having a Shore D hardness that is not larger than 62, and a content of amide units of the polyamide elastomer in the flexible layer is not less than 60 wt %.