The invention relates to a cylinder lock, especially for motor vehicles, comprised of a housing (1) in which a cage (2) is rotatably mounted in the manner of an overload coupling, and in which a cylinder core (3) is mounted. Said cylinder core is connected via the lamellae (33) thereof to the cage (2) when the corresponding key is not located in the key channel. An axially displaceable disconnect coupling (4) is mounted on the axial extension (31) of the cylinder core (3). Said disconnect coupling is connected to the exit element (41) of the cylinder lock in a manner which is always rotationally fixed, and is connected to the cylinder core (3) when turned with the cylinder core (3) in the cage (2). The disconnect coupling does not contact the cylinder core (3) when said cylinder core (3) is simultaneously turned with the cage (2). A carrying device (23) arranged on the cage (2) is provided for disengaging the disconnect coupling (4) from the cylinder core (3). An element (22) which can be disengaged is displaceably mounted in the carrying device. A spring-loaded, displaceable disconnect coupling (4) rests on the inner end of said element (22), and the other end thereof is pressed inside a cam track situated on the front ring (110) of the housing (1).