An endoscope includes: a bending portion, a wire, and a coil sheath, including a single element wire, an outer peripheral face of which is formed to be a curved face on one side of the outer peripheral face and to be a flat surface on another side of the outer peripheral face, the coil sheath being passed inside by the wire and configured by being helically wound by the element wire along a longitudinal direction such that the outer peripheral face formed to be the curved face and the outer peripheral face formed to be the flat surface are in contact with each other.
