A joint ring (8) for an endoscope bending tube (9) that is configured to fit with and to be fixed to a distal end rigid member (21) on a distal end side in an axial direction, the joint ring (8) being formed by plastically deforming a tube material, and the joint ring (8) including a joint ring convex portion (8a) protrudingly provided toward the distal end side in the axial direction, for performing positioning by fitting with distal end rigid concave portions provided at the distal end rigid member (21), and joint ring concave portions (8d) provided near the joint ring convex portion (8a) before the plastic deformation, for preventing deformation of the joint ring convex portion (8a) when plastically deforming the tube material provided with the joint ring convex portion (8a).
