Provided is a medical display device capable of improving convenience for a medical worker.Provided is a medical display device including a display device capable of changing the degree of transparency of a display screen, a holding device that holds the display device, and a control device that controls the degree of transparency of the display screen and controls display on the display screen, wherein the display device is held by the holding device so as to be arranged between an operation part of a patient and a medical worker who performs medical practice for the patient.