A castor suspension system for suspending a first castor at a patient support device is provided. The castor suspension system comprises a pivoting suspension link pivotably attachable to the patient support device, and a springy element comprising a leaf spring made of a band deformed such that the band makes at least one U-turn so that the band has a first leg and at least one second leg. One of the first leg and the at least one second leg is provided with a first support portion supported on the pivoting suspension link, and the other of the first leg and the at least one second leg is provided with a second support portion for supporting the springy element with respect to the patient support device such that the springy element is configured to provide a pre-stress force to the pivoting suspension link.