Bending device and endoscope

A bending device comprising:

• a bendable bending section in which a plurality of bending pieces are coupled;
• a wire, a distal end of the wire being fixed to the bending section, the wire being towed to bend the bending section;
• a plurality of wire receivers provided on an inner circumferential surface of the bending section, the wire being inserted through the wire receivers in an advanceable and retractable manner;
• an inner coil sheath, a distal end of the inner coil sheath being fixed to a cap, the cap being interposed between the bending pieces in an intermediate section of the bending section, the inner coil sheath being inserted through the plurality of wire receivers that are closer to a proximal end of the bending section than the cap and the inner coil sheath extending toward the proximal end of the bending section;
• an outer coil sheath, the inner coil sheath being inserted through the outer coil sheath, the outer coil sheath being arranged proximally relative to the cap;
• a cover that covers an entirety of a region of the inner coil sheath inserted through the plurality of wire receivers on an outer circumference of the inner coil sheath between the cap and the outer coil sheath in a longitudinal axis direction of the wire, the cover being inserted through the wire receivers with the wire, the cover having stretchability in the longitudinal axis direction of the wire, and the cover being advanceable and retractable in the longitudinal axis direction in the bending section between the cap and the outer coil sheath;
• wherein a distal end of the cover abuts a proximal end portion of the cap when the cover advances and retracts in the bending section;
• and
• a proximal end of the cover abuts a distal end portion of the outer coil sheath when the cover advances and retracts in the bending section.