A catheter comprising: a catheter body having a resin layer including an inner layer having a lumen and an outer layer formed in an outer periphery of the inner layer, and a reinforcement layer incorporated in the resin layer and disposed around the lumen and around the inner layer so as to surround the inner layer; a ring-shaped marker made of a radiopaque metal material, the marker being incorporated in the resin layer in a distal end of the catheter body, fixed to a distal end of the reinforcement layer, and disposed around the lumen; and a distal tip made of a resin linked to the distal end of the catheter body, the distal tip having a distal lumen which communicates with the lumen and has an open distal end, wherein an outer diameter of the distal end of the catheter body is 0.6 mm or smaller, and a maximum outer diameter of the distal tip is 0.6 mm or smaller, and characterized in that the reinforcement layer is configured to include a first braid and a second braid disposed in an outer periphery of the first braid, wherein the first braid is continuously disposed from the distal end to a proximal end of the catheter body and wherein the second braid is continuously disposed from an intermediate portion to the proximal end of the catheter body but is not disposed in a distal portion of the catheter body, the distal tip has a Shore D hardness, as measured according to ISO686, of 20 to 40, a dimension of the marker in an axial direction of the catheter body is smaller than a maximum outer diameter of the distal tip, and a length of the distal tip in the axial direction of the distal tip is 3 times to 18 times the maximum outer diameter of the distal tip. a catheter body having a resin layer including an inner layer having a lumen and an outer layer formed in an outer periphery of the inner layer, and a reinforcement layer incorporated in the resin layer and disposed around the lumen and around the inner layer so as to surround the inner layer; a ring-shaped marker made of a radiopaque metal material, the marker being incorporated in the resin layer in a distal end of the catheter body, fixed to a distal end of the reinforcement layer, and disposed around the lumen; and a distal tip made of a resin linked to the distal end of the catheter body, the distal tip having a distal lumen which communicates with the lumen and has an open distal end, wherein an outer diameter of the distal end of the catheter body is 0.6 mm or smaller, and a maximum outer diameter of the distal tip is 0.6 mm or smaller, and characterized in that the reinforcement layer is configured to include a first braid and a second braid disposed in an outer periphery of the first braid, wherein the first braid is continuously disposed from the distal end to a proximal end of the catheter body and wherein the second braid is continuously disposed from an intermediate portion to the proximal end of the catheter body but is not disposed in a distal portion of the catheter body, the distal tip has a Shore D hardness, as measured according to ISO686, of 20 to 40, a dimension of the marker in an axial direction of the catheter body is smaller than a maximum outer diameter of the distal tip, and a length of the distal tip in the axial direction of the distal tip is 3 times to 18 times the maximum outer diameter of the distal tip.