An optical disc unit and a driving method thereof are provided to prevent damage and perform a stabilized gap pull-in method by preventing collision between a light converging element and a disc due to overshoot in the gap pull-in. A driving method of an optical disc unit comprises: a step(1002) for detecting gap between a light converging element and a disc with raising an actuator up in a disc direction by applying actuator drive voltage; a step(1004) for holding the drive voltage value of the actuator when the gap between the light converging element and the disc becomes a first distance which is shorter than a distance of a near field initial point; and a step(1005) for sensing shaking of the disc while holding the drive voltage value and disclosing a gap servo when the gap between the light converging element and the disc becomes a second distance which is shorter than the first distance.
