There is provided it is a kind of treat observation device, including imaging unit, the image viewing for being configured as captures object arrives, and export a vision signal, with be configured to that there are multiple arm unit support units to be rotatably connected with each other, by joint element, and be configured to bearing imaging unit. One actuator is applied with driving force relative to around an at least articulated section for rotation axis rotation, and which defines the imaging units of a posture to form multiple support units, be provided in multiple head units. At least an articulated section and actuator are arranged to be separated from each other, and are connected to via power transmission mechanism, mutually substantially orthogonal for two rotary shafts of rotation between sending.
