The present invention aims to provide an endoscope and its manufacturing method enabling to reduce a diameter of the endoscope required to have airtightness and facilitate a connecting work between a cable and a connector. A first tube body and a second tube body constituting an airtight container are relatively moved to extend and contract, so that it is possible to extend cables from a proximal end part of the second tube body by contracting the container, thereby enabling a connecting work between the cables and an airtight connector. After the completion of connecting work between the cables and the airtight connector, it is possible to store an extra length of the cables in the second tube body as well as to allow the airtight connector to engage with the proximal end part of the second tube body by extending the first tube body and the second tube body.
