PURPOSE: To achieve a smaller diameter of a scope tip so arranged as to allow a stereoscopic viewing by a method wherein a V-shaped recess is formed at a tip face of a scope and images of the same part to be observed are made incident from directions differing from each other with two faces formed to be introduced to an image pickup means.

CONSTITUTION: Scope tip faces 15a and 15b are recessed inward in a V shape at a scope tip face 1a and lens systems 17a and 17b comprising an objective lens or the like which makes images of the same part to be observed incident to focus in directions differing from each other are arranged on the tip faces. Mirrors 19a and 19b are arranged on an optical path of the images of the part to be observed incident and focused with these lens systems to introduced the images of the part to be observed to CCDs 21a and 21b provided in the side wall of the scope tip. With such an arrangement. The scope tip faces each comprises of one plane, which eliminates the need for arranging lenses in a scope diameter-wise direction to focus the images of the part to be observed incident from the plane and separated in two. Thus, the scope diameter can be made smaller than the length twice as much as the diameter of the lens thereby achieving a smaller diameter of the scope tip so arranged to allow a stereoscopic viewing.