A waste receiving device comprising a container defining at its top a container opening enclosed by a container rim, and a lid held on the container and pivotally movable about a lid pivot axis extending along a container rear side between a closed position closing the container opening and an open position exposing the container opening, wherein the waste receiving device comprises a lock device comprising - a lock upper part fastened on the lid side and having a lock upper part housing, a closing mechanism accommodated in the lock upper part housing and a first locking element projecting downwards from the lock upper part housing and pivotable about a pivot axis between a locking position and an unlocking position by actuation of the closing mechanism; and - a lock lower part to be fastened on the container side with a lock lower part housing, a second locking element projecting upwards from the lock lower part housing and pivotally movable about a pivot axis between a locking position and a release position, which in its locking position cooperates with the first locking element located in its locking position in such a way that the lid is locked, a weight part which is operatively connected to the second locking element and is accommodated pivotably in the lock lower part housing in such a way that it positions the second locking element in its locking position in an upright position of the container and, when the container is tilted forward for emptying, automatically transfers it to its release position, in which it is brought out of engagement with the first locking element positioned in its locking position, and a first locking means movably received in the lock lower part housing, which locks the second locking element in its locking position in the upright position of the container, wherein at least one second locking means is movably received in the lock lower part housing and is arranged and formed in such a way that it locks the second locking element in its locking position when the container is tilted sideways from its upright position, characterized in that the second locking means is provided in the form of a ball, which is guidedly movable within the lock lower part housing in a substantially T-shaped guide having a substantially uprightly extending guide portion and two substantially laterally extending guide portions branching therefrom at the lower end, the ball releasing the pivotal movement of the weight member only when positioned at the upper end of the substantially uprightly extending guide portion. - a lock upper part fastened on the lid side and having a lock upper part housing, a closing mechanism accommodated in the lock upper part housing and a first locking element projecting downwards from the lock upper part housing and pivotable about a pivot axis between a locking position and an unlocking position by actuation of the closing mechanism; and - a lock lower part to be fastened on the container side with a lock lower part housing, a second locking element projecting upwards from the lock lower part housing and pivotally movable about a pivot axis between a locking position and a release position, which in its locking position cooperates with the first locking element located in its locking position in such a way that the lid is locked, a weight part which is operatively connected to the second locking element and is accommodated pivotably in the lock lower part housing in such a way that it positions the second locking element in its locking position in an upright position of the container and, when the container is tilted forward for emptying, automatically transfers it to its release position, in which it is brought out of engagement with the first locking element positioned in its locking position, and a first locking means movably received in the lock lower part housing, which locks the second locking element in its locking position in the upright position of the container, wherein at least one second locking means is movably received in the lock lower part housing and is arranged and formed in such a way that it locks the second locking element in its locking position when the container is tilted sideways from its upright position, characterized in that the second locking means is provided in the form of a ball, which is guidedly movable within the lock lower part housing in a substantially T-shaped guide having a substantially uprightly extending guide portion and two substantially laterally extending guide portions branching therefrom at the lower end, the ball releasing the pivotal movement of the weight member only when positioned at the upper end of the substantially uprightly extending guide portion.