An endoscope has a configuration in which a wire guide tube is configured as a tube consecutively formed of polyetheretherketone from one end side to another end side, an opening penetrating is provided in a radial direction at part of a wall portion of a second coupling member into which an end part of the wire guide tube is inserted, a concave portion corresponding to the opening is provided at an outer peripheral surface of the end part of the wire guide tube, and a bonding agent integrally fills the opening and the concave portion to connect the wire guide tube and a coupling portion (the second coupling member).