Abstract: I provide four-dimensional gyroscope with self-action demonstrating the movement of the center of the masses activated by the artificially created non-compensated inertial forces inside it, and which has a lower part and the upper part of the body with the photo-elements forming mass M together with the body of the device; and small masses synchronously rotating in the different directions and creating the rotational inertia; and during the rotation of the small masses, the body of the device, together with the small masses, move translationally along the axis x, creating the translational inertia; and the axis of the rotation of the small masses is fixed on the body, which is moving translationally establishing the connection between the translational and rotational inertia and the accelerating spring and motor-break provide the self-action of the device with the movement of the center of the masses.