An endoscope includes: an insertion portion； an operation portion provided on a proximal end side of the insertion portion, and including a first and a second sheath bodies； a fluid tube, a light guide fiber bundle, and a signal cable extended from a distal end portion and guided into an internal space of the operation portion； a main board provided in the internal space of the operation portion, wherein the fluid tube, the light guide fiber bundle, and the signal cable are provided on a surface of the main board； and an position regulating member attachable/detachable to/from a predetermined position of the main board, and in a state of being attached to the main board, regulates insertion states of the fluid tubes, the light guide fiber bundle, and the signal cable extended from the insertion portion toward the main board into a predetermined insertion state.
