An electric fader drive unit includes a drive portion, a fader position control portion, and an electric fader control portion. The fader position control portion detects a distance between a current position of the electric fader and a target position, indicates a high speed movement mode when the distance is not less than a predetermined value, and indicates a silent movement mode when the distance is less than the predetermined value. The electric fader control portion controls the drive portion to change the drive power to silent drive power not less than the minimum drive power that is the lowest drive power for moving the electric fader when the fader position control portion indicates the silent movement mode, and controls the drive portion to change the drive power to base drive power more than the silent drive power when the fader position control position indicates the high speed movement mode.