The catheter (10) comprises a balloon (14) having a tubular inner layer (24) and an outer layer (26) having elastic resilience and being expandable and contractible by a change in internal pressure, a balloon And a tubular net-like reinforcing member (28) at least a part of which is movably arranged with respect to the balloon (14) between the reinforcing member (26). The reinforcing member (28) has a first sleeve (37) and a second sleeve (38) surrounding both axial end portions of the first sleeve (37). The maximum expanded diameter (D 2) of the second sleeve (38) is set to be smaller than the maximum expanded diameter (D 1) of the first sleeve (37).
