The invention concerns a guard rail for mounting on a bed, where the guard rail includes a plate element which in the situation of use has an upper, approximately horizontal edge, where the plate element has a front side and a back side, the front side facing away from the bed in the situation of use; one or more largely vertically arranged telescoping cylinders, the telescoping cylinders disposed in the situation of use along opposing ends of the plate element, the telescoping cylinders further including fastening means for securing the telescoping cylinders to the bed; and a rod which is mounted on the plate element and which at each end is adapted to engage suspension means fastened on the telescoping cylinders.