An image pickup device, which comprises an optical characteristics changing unit (15), an optical system (45) containing an objective lens (47) and for leading a light from the objective lens to the optical characteristics changing unit, and an image pickup element (52) for receiving a light via the optical characteristics changing unit, wherein the optical characteristics changing unit has two or more dividing units, and has a configuration where one of the dividing units is selectively disposed along an optical path, and the dividing unit has a first region to select a specific wavelength from the light coming from the optical system and a second region where optical characteristics of the light from the optical system are not changed.