Abstract: A screen assembly includes at least one panel with slots in its side edges, a plurality of upright poles to which the panel is fastened and a plurality of fastening elements. The fastening elements and the panel are arranged such that a foot portion of a fastening element can be inserted into one of the slots and can then be rotated in the slot about an axis transverse to the slot, whereupon the foot portion becomes progressively more securely clamped in the slot and in a final position is locked to the panel. The fastening element is thus easily fixed to the panel and provides a very secure fixing when so fixed.