A round baler comprises a baling chamber which is surrounded by compression elements in the form of a single compression belt or a plurality of compression belts, the adjacent edges of which butt directly against one another. The compression elements rest on a drivable roll and freely running rolls and is guided laterally through lateral guides in the axial direction of at least one of the rolls. The lateral guides are arranged on both sides of the compression elements immediately upstream of a drivable roll with regard to the direction of movement of the compression elements which applies during the baling operation. They consist of discs which rotate in the plane of the compression elements, the discs having grooves into which the compression elements extends.