The present disclosure relates to a medical microscope field. A stereo microscope connected to an optical coherence tomography (OCT) unit for forming a tomographic image of a target object includes an objective lens unit including a plurality of lenses each having an aperture of a predetermined size, a pair of first magnification lens units each including a plurality of lenses having a pair of magnification lens apertures positioned within the aperture of the objective lens unit, a second magnification lens unit including a plurality of lenses having an OCT aperture disposed separately from the pair of magnification lens aperture within the aperture of the objective lens unit, and a light delivery unit configured to receive light from the OCT unit and deliver the light to the second magnification lens unit and configured to deliver light received from the second magnification lens unit to the OCT unit.
