The invention relates to a cable bushing to be screwed together with a wall comprising a passage for at least one prefabricated cable, comprising two partial elements, which are screwed together with one another in the installed state, a threaded section, which is formed by the two partial elements in each case in a part of its circumference, and comprises a thread, for feeding through the passage, a receptacle section adjoining thereon in the axial direction of an axis of rotation of the threaded section, which has a larger external diameter than the threaded section at least in sections, and which comprises at least one receptacle opening for accommodating at least one strain relief bushing. The cable bushing according to the invention is characterized in that the division between the two partial elements is formed off-center, so that the circumference of the receptacle opening extending around the at least one strain relief bushing is greater in one of the partial elements than in the other of the partial elements.