| abstract |
A balloon catheter capable of effectively delivering a drug to a living tissue and capable of adjusting the delivery property, a manufacturing method thereof, and a treatment method thereof are provided. A balloon catheter (10) in which a plurality of elongated bodies (42) that are crystals of a water-insoluble drug extending with an independent long axis are provided on the outer surface of the balloon (30), the balloon (30) A base layer (41) containing a water-soluble low molecular weight compound arranged in a layer on the outer surface of the base layer (41), and at least a part of the elongated body (42) is located inside the base layer (41). |