A catheter includes a balloon that has an inner layer and an outer layer having elastic stretching properties, having tubular shapes, and being able to be inflated and deflated in response to a change of internal pressure; and a tubular net-shaped reinforcement member that is disposed between the inner layer and the outer layer such that at least a part thereof is movable with respect to the balloon. The reinforcement member has a first sleeve, and second sleeves which respectively surround both end portions of the first sleeve in an axial direction. A maximally inflated diameter of the second sleeve is set so as to be smaller than a maximally inflated diameter of the first sleeve.