Cover for a storage receptacle, in particular for a waste receptacle, comprising - a base body which is of frame-like configuration and can be placed detachably on an edge of an upper opening of a housing of the storage receptacle, the base body having two lateral frame parts (30, 31) and a front frame part and a rear frame part, which have a cross-section which is downwardly open and is at least in parts substantially U-shaped, the frame parts (30, 31, 32, 33) having a web (301, 311, 321, 331), which forms an upper face of the base body, and two substantially parallel legs (340, 341), which project downwards after assembly with the upper edge region of the housing between them, - at least one cover part (4, 5) which is hingedly mounted on the base body in such a way that it can be pivoted inwards from a closed position, in which it can close the upper opening of the housing of the receptacle, into an open position, in which it can uncover the opening, - retaining means for retaining the cover part (4, 5) in the open position, characterised in that the retaining means comprises two pairs of retaining projections (41, 42, 51, 52), which are formed on an underside of the cover part (4, 5), wherein an intermediate space is formed between the retaining projections (41, 42, 51, 52) of each of the two pairs of retaining projections (41, 42, 51, 52), in each of which a retaining portion formed on the base body can frictionally engage, and in that the inner faces of the legs (340, 341) are connected to one another by a plurality of reinforcing ribs which extend parallel to one another but not as far as the lower ends of the legs (340, 341). - a base body which is of frame-like configuration and can be placed detachably on an edge of an upper opening of a housing of the storage receptacle, the base body having two lateral frame parts (30, 31) and a front frame part and a rear frame part, which have a cross-section which is downwardly open and is at least in parts substantially U-shaped, the frame parts (30, 31, 32, 33) having a web (301, 311, 321, 331), which forms an upper face of the base body, and two substantially parallel legs (340, 341), which project downwards after assembly with the upper edge region of the housing between them, - at least one cover part (4, 5) which is hingedly mounted on the base body in such a way that it can be pivoted inwards from a closed position, in which it can close the upper opening of the housing of the receptacle, into an open position, in which it can uncover the opening, - retaining means for retaining the cover part (4, 5) in the open position, characterised in that the retaining means comprises two pairs of retaining projections (41, 42, 51, 52), which are formed on an underside of the cover part (4, 5), wherein an intermediate space is formed between the retaining projections (41, 42, 51, 52) of each of the two pairs of retaining projections (41, 42, 51, 52), in each of which a retaining portion formed on the base body can frictionally engage, and in that the inner faces of the legs (340, 341) are connected to one another by a plurality of reinforcing ribs which extend parallel to one another but not as far as the lower ends of the legs (340, 341).