Support structure for a frame formwork panel comprising a support structure and a formwork skin connected to the support structure, wherein the support structure has two longitudinal edge girders and two transverse edge girders, wherein in at least some of the corner regions of the support structure where a longitudinal edge girder and a transverse edge girder come together a corner connecting piece which is welded to the two respective edge girders (4,6) is provided, wherein the two longitudinal edge girders and the two transverse edge girders each have, on their rear side, a flange (5,7) projecting toward the center region of the support structure, and wherein the corner connecting pieces, each are welded to the two flanges (5,7) of the two edge girders (4,6) coming together at the respective corner of the support structure, characterized in that in at least one of the following weld connection positions of the corner connecting pieces with the flanges: a) a welded connection between the longitudinal edge girder and the corner connecting piece; b) a welded connection between the transverse edge girder and the corner connecting piece; c) a welded connection in the region of the miter surfaces of two edge girders (4,6) coming together there a welded connection is configured as a plug weld connection or as a recess weld at least once, wherein in at least some of the corners of the support structure, at least one of the flanges (5,7) of the two edge girders (4,6) coming together there has a recess at its edge for welding with the corner connecting piece positioned there; and/or in the case of the plug weld connection position(s) a) and b) the plug weld connection is formed with a hole in the flange (5,7) of the respective edge girder (4,6). wherein the support structure has two longitudinal edge girders and two transverse edge girders, wherein in at least some of the corner regions of the support structure where a longitudinal edge girder and a transverse edge girder come together a corner connecting piece which is welded to the two respective edge girders (4,6) is provided, wherein the two longitudinal edge girders and the two transverse edge girders each have, on their rear side, a flange (5,7) projecting toward the center region of the support structure, and wherein the corner connecting pieces, each are welded to the two flanges (5,7) of the two edge girders (4,6) coming together at the respective corner of the support structure, characterized in that in at least one of the following weld connection positions of the corner connecting pieces with the flanges: a) a welded connection between the longitudinal edge girder and the corner connecting piece; b) a welded connection between the transverse edge girder and the corner connecting piece; c) a welded connection in the region of the miter surfaces of two edge girders (4,6) coming together there a) a welded connection between the longitudinal edge girder and the corner connecting piece; b) a welded connection between the transverse edge girder and the corner connecting piece; c) a welded connection in the region of the miter surfaces of two edge girders (4,6) coming together there a welded connection is configured as a plug weld connection or as a recess weld at least once, wherein in at least some of the corners of the support structure, at least one of the flanges (5,7) of the two edge girders (4,6) coming together there has a recess at its edge for welding with the corner connecting piece positioned there; and/or in the case of the plug weld connection position(s) a) and b) the plug weld connection is formed with a hole in the flange (5,7) of the respective edge girder (4,6).