The catheter (1, 11) for an endoscope of the present invention comprises an openings (2, 12) in the vicinity of the tip at a distal end thereof, wherein the opening has a diameter smaller than an inner diameter of the catheter, and a plurality of said openings are provided. The catheter for an endoscope of the present invention can have multiple functions such as irrigation, suction, incision, cauterization, hemostasis by coagulation, and smoke evacuation.
