A supporting structure of plastic construction for a formwork panel, which comprises the supporting structure and a formwork skin positioned on the front side of the supporting structure and attached to the supporting structure, wherein the supporting structure comprises a main body made of plastic with two longitudinal edge supports and two transverse edge supports and comprises, in the region of the front sides of the two longitudinal edge supports and/or of the two transverse edge supports, an edge protection provided for protecting at least part of the edge of the formwork skin after attachment thereof to the supporting structure, wherein the edge protection is made of a material different from the material of said supports of the supporting structure and has a portion projecting forward from the respective said support (6; 8); and/or wherein the supporting structure comprises a main body made of plastic with two longitudinal edge supports and two transverse edge supports and comprises, in the region of the front sides of the two longitudinal edge supports and/or of the two transverse edge supports and/or in the region of the rear sides of the two longitudinal edge supports and/ or of the two transverse edge supports, a reinforcement made of a material different from the material of said supports (6; 8) of the supporting structure, characterized in that the edge support front sides, provided with the edge protection and/or with the reinforcement, and/or the edge support rear sides, provided with the reinforcement, have respective series of extensions, which protrude from the respective front side or rear side and which project into holes in the edge protection or the reinforcement, respectively. wherein the supporting structure comprises a main body made of plastic with two longitudinal edge supports and two transverse edge supports and comprises, in the region of the front sides of the two longitudinal edge supports and/or of the two transverse edge supports, an edge protection provided for protecting at least part of the edge of the formwork skin after attachment thereof to the supporting structure, wherein the edge protection is made of a material different from the material of said supports of the supporting structure and has a portion projecting forward from the respective said support (6; 8); and/or wherein the supporting structure comprises a main body made of plastic with two longitudinal edge supports and two transverse edge supports and comprises, in the region of the front sides of the two longitudinal edge supports and/or of the two transverse edge supports and/or in the region of the rear sides of the two longitudinal edge supports and/ or of the two transverse edge supports, a reinforcement made of a material different from the material of said supports (6; 8) of the supporting structure, characterized in that the edge support front sides, provided with the edge protection and/or with the reinforcement, and/or the edge support rear sides, provided with the reinforcement, have respective series of extensions, which protrude from the respective front side or rear side and which project into holes in the edge protection or the reinforcement, respectively.