PROBLEM TO BE SOLVED: To easily grasp the surrounding situation when performing medical treatment by using a microscope.SOLUTION: A medical treatment device includes an ocular microscope that visibly presents a magnified image of a diseased part of a patient, supported on a treatment table, to a practioner. An imaged image of the surrounding of a part, being a part of the patient supported on the treatment table and other than the diseased part, and at least one of treatment table information images 170 showing information regarding the treatment table supporting the patient are displayed in the field of view of the microscope as a superimposed image while keeping at least a part of the magnified image of the diseased part visible in the field of view of the microscope.
