Abstract: The catheter for continuous ambulatory peritoneal dialysis includes a hypodermic tunnel portion at the intermediate portion of a tube formed with a soft biocompatable material. One leg portion of the catheter serves as an external extension. Another leg portion serves as a peritoneal cavity insertion portion having suction/drain holes. A first cuff at the boundary between the hypodermic tunnel portion and the peritoneal cavity insertion portion, the portion in the vicinity of the first cuff toward the inside of the peritoneal cavity from the first cuff is structurally such that the restoring force of the tube is enhanced. The hypodermic tunnel portion is bent in a loop form so as to take an inverse U-shape when positioned in the patient. The second cuff is disposed at the vertex of the loop.