PROBLEM TO BE SOLVED: To provide an endoscope binding tube capable of being inexpensively and easily connected without increasing a part number, and a binding method for an endoscope binding tube.SOLUTION: An air/water feeding tube 60 includes an externally fitting part 61a, a merging part 61b and an applying part 61c. The externally fitting part 61a is so adhered to an adhesion member 71 in an adhering part 55 including the adhesion member 71 that an air feed tube 51 and a water feed tube 53 are bundled together and adhered by the adhesion member 71 enclosing an end part 51a of the air feed tube 51 and an end part 53a of the water feed tube 53. The applying part 61c is so arranged at a joint part between the externally fitting part 61a and a merging part 61b such that the externally fitting part 61a is arranged on the outer side with respect to the merging part 61b by the thickness of the adhesion portion 55 including the adhesion member 71, and such that the inner peripheral surfaces of a plurality of resin tubes (the air feeding tube 51 and the water feeding tube 53) arranged on the externally fitting part 61a may smoothly merge into the inner peripheral surface of the merging part 61b.
