An atherectomy catheter , comprising: a first tubular body which has an opening in a side wall and whose distal end is opened; a cutter which is positioned near the opening in an internal space of the first tubular body and which can move in an axial direction of the first tubular body ; and a distal end portion connected to the distal end of the first tubular body , wherein the distal end portion has: a resin made second tubular body which is connected to the distal end of the first tubular body by continuing an internal space and whose rigidity is higher than that of the first tubular body wherein the resin made second tubular body is reinforced by a core material ; a resin made third tubular body containing soft plastic, which is connected to a distal end of the second tubular body by continuing an internal space and whose diameter is reduced in a tapered shape from the distal end of the second tubular body wherein the rigidity of the second tubular body is higher than that of the third tubular body; and a resin made fourth tubular body whose outer diameter is smaller than an outer diameter of the distal end of the second tubular body , whose first end side is projected outward from a distal end of the third tubular body , and whose second end side is extended into the internal space of the second tubular body through the internal space of the third tubular body . a first tubular body which has an opening in a side wall and whose distal end is opened; a cutter which is positioned near the opening in an internal space of the first tubular body and which can move in an axial direction of the first tubular body ; and a distal end portion connected to the distal end of the first tubular body , wherein the distal end portion has: a resin made second tubular body which is connected to the distal end of the first tubular body by continuing an internal space and whose rigidity is higher than that of the first tubular body wherein the resin made second tubular body is reinforced by a core material ; a resin made third tubular body containing soft plastic, which is connected to a distal end of the second tubular body by continuing an internal space and whose diameter is reduced in a tapered shape from the distal end of the second tubular body wherein the rigidity of the second tubular body is higher than that of the third tubular body; and a resin made fourth tubular body whose outer diameter is smaller than an outer diameter of the distal end of the second tubular body , whose first end side is projected outward from a distal end of the third tubular body , and whose second end side is extended into the internal space of the second tubular body through the internal space of the third tubular body . a resin made second tubular body which is connected to the distal end of the first tubular body by continuing an internal space and whose rigidity is higher than that of the first tubular body wherein the resin made second tubular body is reinforced by a core material ; a resin made third tubular body containing soft plastic, which is connected to a distal end of the second tubular body by continuing an internal space and whose diameter is reduced in a tapered shape from the distal end of the second tubular body wherein the rigidity of the second tubular body is higher than that of the third tubular body; and a resin made fourth tubular body whose outer diameter is smaller than an outer diameter of the distal end of the second tubular body , whose first end side is projected outward from a distal end of the third tubular body , and whose second end side is extended into the internal space of the second tubular body through the internal space of the third tubular body . <EOS>