Cable bushing for passing a cable into and through a hole in a housing wall and for sealing and strain-relieving the cable, comprising: - a connection element which encloses an axis, having o a clamping portion for mounting a cable, having an inner surface which has a clamping portion internal diameter, and o a sealing portion which is formed to seal off the cable together with the housing, and - a receiving element comprising a fastening region for mechanical fastening to the connection element and a clamping region for cooperating with the connection element in such a way that when the receiving element is fastened to the connection element the clamping portion internal diameter is brought from a first diameter dimension to a second diameter dimension smaller than the first diameter dimension at least over portions of the periphery of the inner surface, - the connection element having an insertion sleeve which is formed to place the clamping portion in a receiving position relative to the receiving element in the axial direction and which can be connected to the receiving element by means of a connection means, the sealing portion being arranged spaced apart from the clamping portion in the axial direction, the insertion sleeve having a holding portion for insertion into a housing hole, in particular a holding sleeve facing away from the receiving element in the axial direction, and the insertion sleeve having a flange portion which has an external diameter greater than an external diameter of an outer surface of the insertion sleeve arranged adjacent to the flange portion, and a sealing element being arranged, in particular extending around annularly, on a face of the flange portion which faces the holding portion in the axial direction, characterised by at least one holding portion opening, which extends in the insertion sleeve in an at least partially radial direction and through which the sealing element extends radially inwards, in particular in such a way that the sealing element is formed integral with the sealing portion, the sealing portion and the sealing element being injected onto the connection element. - a connection element which encloses an axis, having o a clamping portion for mounting a cable, having an inner surface which has a clamping portion internal diameter, and o a sealing portion which is formed to seal off the cable together with the housing, and o a clamping portion for mounting a cable, having an inner surface which has a clamping portion internal diameter, and o a sealing portion which is formed to seal off the cable together with the housing, and - a receiving element comprising a fastening region for mechanical fastening to the connection element and a clamping region for cooperating with the connection element in such a way that when the receiving element is fastened to the connection element the clamping portion internal diameter is brought from a first diameter dimension to a second diameter dimension smaller than the first diameter dimension at least over portions of the periphery of the inner surface, - the connection element having an insertion sleeve which is formed to place the clamping portion in a receiving position relative to the receiving element in the axial direction and which can be connected to the receiving element by means of a connection means,