An endoscope has an objective lens and an optical image-transmission system for transmitting an image formed by the objective lens. The optical image-transmission system contains at least one rod-shaped lens (21) and an amplification element (22) which is located at the periphery of the rod-shaped lens (21). That is to say, the endoscope is constructed in such a manner that transmission lenses are not damaged and a clear image is always visible even if the insertion piece of the endoscope is bent during use or during storage. <IMAGE>
