An electronic endoscope includes a cylindrical transparent cover whose observation window in a cylindrical part is transparent, a body part that has a cylindrical part provided continuously to the cylindrical part of the transparent cover, a lens holder that revolves about a center axis of the transparent cover in an inside of the transparent cover and the body part and that moves in a direction of the center axis, an objective mirror that is provided in the lens holder and that reflects, toward the body part, light entering through an objective lens provided at a position facing the cylindrical part of the transparent cover, an imaging device that receives light reflected from the objective mirror and that converts the light into an electric signal, and a driving section provided inside the body part and that drives and revolves the lens holder.
