A balloon coating method which makes it possible to suitably set the thickness and morphological form of a drug in a coating formed on a balloon is provided. The balloon coating method is for forming a coating layer (32) containing a water-insoluble drug on an outer surface of a balloon (30) of a balloon catheter (10). The balloon coating method includes an application step in which, where a flexible dispensing tube (94) for supplying a coating solution containing the water-insoluble drug and a solvent is formed at its end portion with an opening portion (95) for discharging the coating solution therethrough and when the opening portion-formed end portion side of the dispensing tube (94) is kept in contact with the outer surface of the balloon (30) in such a manner as to be oriented in a direction opposite to a rotating direction of the balloon (30) while the balloon (30) is rotated about an axis of the balloon (30), the coating solution is discharged through the opening portion (95) and applied to the outer surface of the balloon (30) while the dispensing tube (94) is moved relative to the balloon (30) in an axial direction X of the balloon (30).
