PROBLEM TO BE SOLVED: To provide a catheter with a balloon which can return to an original shape before extension at a time of a re-shrinkage after extension easily.SOLUTION: A baloon 14 of a catheter 10 has an internal layer 24 and an external layer 26 with elastic stretchability, and a reinforcing member 28 having a structure of cylindrical net is arranged between the internal layer 24 and the external layer 26. In the baloon 14, friction between the parts where yarn 29 constituting the reinforcing member 28 contacts with is reduced because lubricant M is present at least on an external surface of the yarn 29.SELECTED DRAWING: Figure 2
