According to a endoscope, an engaging part delivered from a delivery port advances while being guided to an opening of a housing part by an engagement guide path. Then, as the engaging part comes into contact with a deformation generating part, the engaging part is moved in a direction from a bottom surface of the housing part toward the opening, and thereby, the wire is elastically deformed. Then, in a case where the engaging part that advances within the engagement guide path has passed by the deformation generating part, the engaging part is housed in the housing part from the opening by a restoring force of the wire.
