A self-supporting modular panel for dividing spaces and/or supporting furniture elements includes a support structure including a cross-beam and an upright fastened to the cross-beam. The support structure has a plurality of horizontal notches. A first plurality of cover sheets are fastened to the cross-beam so as to provide a rest base, and define a housing volume arranged within the rest base. A second plurality of cover sheets are fastened to the upright of the modular support structure so as to provide a wall having plurality of horizontal grooves which provide a passageway for a bracket mount which can be geometrically coupled to a shaped profile that is accommodated within one of the horizontal notches of the support structure. The rest base, with the housing volume, defines a wiring recess suitable to accommodate a plurality of wires.