A rotary axis module includes an actuator that includes a first member and a second member, the actuator relatively driving the second member so as to rotate about a predetermined axis with respect to the first member, a DC power source, and a switch. The actuator includes a brake that is releasable by supplying a DC voltage. A first brake circuit that is connected to a control device that controls the actuator, and a second brake circuit that is provided in parallel with the first brake circuit and connected to the DC power source via the switch, are connected to the brake.