A sterile screen cover made of radioprotective material has an L-shaped horizontal section, including a front wall associated with a side wall. The front wall has two orifices through which the arms of the operator can pass, a first orifice being located close to the angle of the screen, the second being located on the free edge of the front wall. The sterile cover is a single part that includes at least one internal “panel” and one “external panel” joined together by a joining region, the panels intended to cover, respectively, at least the internal and external faces of the front wall and at least part of the height of its free edge. The joining region has an indentation shaped to match the border of the second passage orifice; these inner and outer panels are each provided with an opening intended to be placed in front of the first passage orifice.