A roller shutter having multiple profiled bars arranged substantially parallel to one another and connecting elements which connect adjacent profiled bars to one another and permit a relative movement of the profiled bars, during which relative movement the distance of the adjacent profiled bars from one another changes, (a) in which at least one connecting element (4, 40) comprises a bar-like connector (5, 50) having at least one end region (7, 8, 70), the diameter of which is greater than the diameter of the connector (5, 50) in a central region (9, 90), (b) and at least one of the profiled bars (2, 3, 20, 30) connected by the connecting element (4, 40) has a chamber (10, 100) into which the connector (5, 50) extends and in which the at least one end region (7, 8, 70) of the connector (5, 50) is accommodated such that it is displaceable inside the chamber (10, 100), characterised in that the chamber (10, 100) comprises a guide housing (10, 100), which is provided with a device (14, 141, 142) which prevents the at least one end region (7, 8, 70) of the connector (5, 50) being able to leave the chamber (10, 100), - wherein the guide housing encloses two stops (7, 8), which can be moved therein, of two connectors and is provided on each of its sides facing an adjacent profiled bar with an opening, preferably in the form of a sleeve, through which one of the connectors extends and the clear width of which is greater than the diameter of the connector in the central region but smaller than the diameter of the stop (7, 8), or - wherein the guide housing encloses an end region, which can be moved therein, of a connector and is provided on its side facing the adjacent profiled bar, to which the connector is fixedly connected, with an opening, through which the connector extends and the clear width of which is greater than the diameter of the connector in the central region but smaller than the diameter of the end region. (a) in which at least one connecting element (4, 40) comprises a bar-like connector (5, 50) having at least one end region (7, 8, 70), the diameter of which is greater than the diameter of the connector (5, 50) in a central region (9, 90), (b) and at least one of the profiled bars (2, 3, 20, 30) connected by the connecting element (4, 40) has a chamber (10, 100) into which the connector (5, 50) extends and in which the at least one end region (7, 8, 70) of the connector (5, 50) is accommodated such that it is displaceable inside the chamber (10, 100), - wherein the guide housing encloses two stops (7, 8), which can be moved therein, of two connectors and is provided on each of its sides facing an adjacent profiled bar with an opening, preferably in the form of a sleeve, through which one of the connectors extends and the clear width of which is greater than the diameter of the connector in the central region but smaller than the diameter of the stop (7, 8), or - wherein the guide housing encloses an end region, which can be moved therein, of a connector and is provided on its side facing the adjacent profiled bar, to which the connector is fixedly connected, with an opening, through which the connector extends and the clear width of which is greater than the diameter of the connector in the central region but smaller than the diameter of the end region.