A support for radiant plates has an upright provided with a means for fastening to a radiant plate; the means has a first jaw element that is integral with the upright and a second jaw element that is hinged to the first jaw element about a hinge axis, the support also including a screw locking means, acting transversely to the hinge axis, in order to lock at least one convection blade of the radiant plate between the first and second jaw elements. The support has a stop means which cooperates with the locking means and is adapted to limit the relative movement between the radiant plate and the jaw elements.