The reinforcing panel for reinforced concrete structures comprises a plurality of sticks (2) suitable for being arranged parallel to each other through a panel (12) of insulating material. The sticks (2), near the opposite ends (20), have a corresponding pair of slots (4, 5) protruding bilaterally in use from said panel (12) of insulating material. The slots (4, 5) are suitable for engaging and retaining reinforcing metal wires (6) on orthogonal planes.