Abstract: Cover for a waste container consisting of a cover plate (3) with peripheral wall which fits onto the standing upper rim (2) of the container, in which cover plate is recessed a circular opening (4) which is closable by a circular lid (7), wherein an outer peripheral wall of the lid and the inner periphery of the recess have co-acting cams for locking the lid in the recess, wherein the cams (23, 24, 60, 62) are disposed in different levels or are elongate and are disposed sloping relative to the line of symmetry of the lid such that an opening is formed between the one end of a cam and the other end of the adjacent cam, which opening serves for passage of the co-acting cam, wherein the axially oriented lower surface of the one cam in addition to the opposite axial surface of the other co-acting cam have indentations for defining different closing positions of the lid in the cover plate, whereby one or more intermediate positions of the lid in which the lid can be removed, and an end position in which the lid i