Abstract: The device with supporting tray adapted for mounting on the steering wheel of a vehicle comprises:(a) a rigid panel with two parallel folding lines so as to divide the panel in three parts, namely a first central part, a second part with an opening and a third part, the opening being adapted for being moved downwards so that the wheel partly passes through the opening and so that edges of the opening are supported by the wheel, and(b) a link for linking the third part and the first part together so as to maintain the third part substantially horizontal.