Abstract: An endoscope having an objective lens, a zoom lens, a solid state imaging device for picking up the image formed by said objective lens and transferred by said zoom lens, and control means for moving the zoom lens and the imaging device so as to assure that for each position occupied by the zoom lens the imaging device is positioned so that the its image-receiving surface is in the focal plane of the zoom lens. The endoscope also comprises first and second motion-transmitting means for moving said zoom lens and said imaging device respectively along the optical axis of said objective lens, whereby the axial spacing between said zoom lens and said objective lens and also the axial spacing between said imaging device and said objective lens may be changed, and manually operable switch means for controlling movement of the zoom lens and the imaging device by said first and second motion transmitting means.