A bedside table to be arranged in an area of a folding side extension of a mattress assembly. The bedside table includes a surface suitable for receiving or storing at least one object and apparatus for releasably attaching the surface of the bedside table to the folding lateral extension of the mattress assembly, such that the surface of the bedside table can be releasably attached to the mattress assembly even when the lateral extension is being folded or it is already folded.
