An actuator which can be installed in a system for the virtual simulation of aircraft, ships and vehicles to help the system with the controls. More specifically, the invention is an actuator used for a control loading system, which can be installed into a virtual simulation system, receive force delivered by the movement of a control stick laterally while measuring the applied force. It can connect a lever which delivers the control force equivalent to the applied force and reaction force by making use of a direct drive motor, including a potentiometer which senses the angle of rotation while sensing the initial reference position separately from an encoder, limiting the rotation range of the rotating lever, fixing the initial neutral position, and the control loading system for actuators manufactured compactly on the whole.