The hospital bed Q) comprises a guiding wheel (2) fixed to the chassis (3) of the bed (1) which can be moved between a storage and use position. The positioning of the guiding wheel (2) is achieved using a pedal (4), the activation of which results in the movement of a drawbar (5), which then acts on connection members comprising a cam (14), guiding member (15) and lever (17). In order to force the guiding wheel (2) against the surface a flexible member (10) is used which is connected to the frame of the bed at one end and to the profile (8) at the other end.
