A joint-ring for an endoscope-bending-tube that fits with and is fixed to a rigid-member on a distal end side, the joint-ring being formed by plastically deforming a tube-material, the joint-ring including a joint-ring-convex portion provided in the tube-material before the plastic deformation, configured to fit with distal end rigid concave portions of the distal end rigid-member to perform positioning, and protrudingly provided to the distal end side, a plastically deformed shape portion provided in the joint-ring such that an axial direction position thereof overlaps the joint-ring-convex-portion and formed by force of stretching along a circumferential surface in the plastic deformation, and joint-ring-convex-portions provided in the tube-material before the plastic deformation near both sides in the circumferential direction of the joint-ring-convex-portion to interrupt the force of stretching along the circumferential surface to keep the force from reaching the joint-ring-convex-portion to thereby prevent deformation of the joint-ring-convex-portion due to the plastic deformation.
