A camera module comprising: a base; a stator disposed on the base; a cover fixed to the base and wrapping the stator; a mover disposed in the cover and comprising a lens; an elastic member connecting the mover and the stator; an actuator (200, 1200) comprising a coil disposed on the mover and a magnet disposed in the cover and facing the coil; and an actuator driving unit (210, 1210) configured to control the actuator (200, 1200) to move the mover in a forward direction or in a backward direction, wherein the mover is spaced apart from the cover by a first gap and from the base by a second gap when no current is applied to the actuator (200, 1200), characterized in that a direction bit is allocated in the actuator driving unit (210, 1210), wherein the direction bit comprises a forward movement information that the mover moves toward the cover to decrease the first gap and a reverse movement information that the mover moves toward the base to decrease the second gap, wherein the actuator driving unit (210, 1210) is configured to move the mover from an initial position to an infinity position or to a macro position, then search a best focusing point by moving the mover from the infinity position to the macro position or from the macro position to the infinity position, and then perform a focusing using the best focusing point, characterized in that the actuator driving unit (210, 1210) is configured to move the mover along a plurality of moving steps, the plurality of moving steps comprises a first step and a second step after the first step, and the actuator driving unit (210, 1210) is configured to lengthen a time of moving the mover in the first step over that of the second step to reduce a mechanical impact sound wherein the camera module comprises: a posture detection unit (230, 1230) outputting a posture data by detecting a posture of the mover, and a controller (220, 1220) configured for receiving the posture data outputted by the posture detection unit (230, 1230) and outputting a control signal to the actuator driving unit (210, 1210) to drive the actuator in response to the posture of the mover and wherein the posture of the mover is one of an 'UP' posture of the lens, a 'SIDE' posture of the lens and a 'DOWN' posture of the lens. a base; a stator disposed on the base; a cover fixed to the base and wrapping the stator; a mover disposed in the cover and comprising a lens; an elastic member connecting the mover and the stator; an actuator (200, 1200) comprising a coil disposed on the mover and a magnet disposed in the cover and facing the coil; and an actuator driving unit (210, 1210) configured to control the actuator (200, 1200) to move the mover in a forward direction or in a backward direction, wherein the mover is spaced apart from the cover by a first gap and from the base by a second gap when no current is applied to the actuator (200, 1200), characterized in that a direction bit is allocated in the actuator driving unit (210, 1210), wherein the direction bit comprises a forward movement information that the mover moves toward the cover to decrease the first gap and a reverse movement information that the mover moves toward the base to decrease the second gap, wherein the actuator driving unit (210, 1210) is configured to move the mover from an initial position to an infinity position or to a macro position, then search a best focusing point by moving the mover from the infinity position to the macro position or from the macro position to the infinity position, and then perform a focusing using the best focusing point, characterized in that the actuator driving unit (210, 1210) is configured to move the mover along a plurality of moving steps, the plurality of moving steps comprises a first step and a second step after the first step, and the actuator driving unit (210, 1210) is configured to lengthen a time of moving the mover in the first step over that of the second step to reduce a mechanical impact sound wherein the camera module comprises: a posture detection unit (230, 1230) outputting a posture data by detecting a posture of the mover, and a controller (220, 1220) configured for receiving the posture data outputted by the posture detection unit (230, 1230) and outputting a control signal to the actuator driving unit (210, 1210) to drive the actuator in response to the posture of the mover and wherein the posture of the mover is one of an 'UP' posture of the lens, a 'SIDE' posture of the lens and a 'DOWN' posture of the lens. a posture detection unit (230, 1230) outputting a posture data by detecting a posture of the mover, and a controller (220, 1220) configured for receiving the posture data outputted by the posture detection unit (230, 1230) and outputting a control signal to the actuator driving unit (210, 1210) to drive the actuator in response to the posture of the mover and wherein the posture of the mover is one of an 'UP' posture of the lens, a 'SIDE' posture of the lens and a 'DOWN' posture of the lens.