By using a surgical microscope device, it becomes possible to continue surgery more reliably, even in the case in which the picture of the operating site is no longer displayed normally.Provided is a surgical microscope device including: a microscope unit (110) that images an observation target, and outputs a picture signal； a support unit (120) that supports the microscope unit, and is configured as a balance arm； and an auxiliary observation device (30) that is attachable to the microscope unit or the support unit. A manually operated manual brake mechanism (40) is provided with respect to at least one of a plurality of rotation axis units constituting the support unit.
