To provide an anticoagulant and antibacterial catheter, which can provide anticoagulant and/or antibacterial properties according to the vital position of a human body on which the catheter is applied, easily and visually determine or estimate the border of the applied properties, and always hold the border at an appropriate position.

On the outer the surface of this catheter main body 2 with a lumen 1a communicating with the closed end 2a and provided with the base end part 2b with a lure adapter 3 communicating with the inner bore 1a, an anticoagulant process and/or an antibacterial process are applied on the blood vessel part A which is held within the blood vessel of a human body and the antibacterial process is applied on the remaining part B which is not held within the blood vessel.