Bending structure body

A bending structure body, comprising:

• a plurality of bendable parts that are elastically bendable with respect to an axial direction;
• an intermediate part positioned between adjacent bendable parts;
• and
• a wire inserted through the plurality of bendable parts and the intermediate part,
• wherein the plurality of bendable parts comprise a flexible member that is integral in the axial direction,
• the flexible member comprises an inner coil part and an outer coil part, and corresponding winding parts of the inner coil part are fitted into gaps between adjacent winding parts of the outer coil part,
• the intermediate part suppresses bending of the flexible member with respect to the axial direction by inserting the flexible member through the intermediate part to attach an inner circumference of the intermediate part to the flexible member between the adjacent bendable parts, and
• an entire length of the intermediate part in the axial direction is smaller than a difference between an inner diameter of the intermediate part and an outer diameter of the intermediate part in a radial direction.