Abstract: A machine tool for machining workpieces formed of wood, synthetic plastic materials and the like is disclosed, including a transport device mounted on a frame for transporting the workpiece relative to at least one laterally arranged workpiece, and a sound damping cover unit arranged laterally of the tool for partially surrounding the round radiating region of the tool or the workpiece, characterized in that the sound damping cover unit includes a plurality of pivotally connected sound damping members that are displaceable between retracted position and extended positions above and/or below the plane of movement of the workpiece. One end of the damping cover unit is connected with a supporting frame that contains a receiving space for receiving the damping cover unit when in the retracted position.