Abstract: A plate-shaped footrest assembly for a chair; includes a footrest for support of the rear side of the legs of a user, and a footplate for placement of the feet of the user thereon, with the footplate being so linked to the footrest as to permit a pivoting between a stowed position when not being used and an unfolded position when in use. The footplate extends in the unfolded position at an inclination to the footrest. In stowed position, the footplate forms a major central area of the footrest while projecting in the unfolded position almost entirely across a useful support surface of the footrest.