A protective wall releasably connectable to a floor, the wall comprising panels, a U-section rail with legs extending in parallel, and a web gripping the panels and locked thereon. A U-shaped holding pocket is disposed on free ends of the legs of the rail and is disposed such that a holding plate is insertable into each holding pocket, the holding plates being attached to a holding fixture fixed onto a floor, a holding groove is provided on an outside of the web, and a locking body is disposed in the holding groove, such that the locking body is supported on the holding fixture and is mounted such that it is moveable in a horizontal direction relative to the holding fixture.