The invention relates to a support frame for supporting and/or fastening wall structures, the support frame (2) comprising first and second flange parts extending in the longitudinal direction of the support frame (2) and a web extending between them. The support frame (2) of the invention is made up of two elongated plate parts (4, 5) to which two or more fastening brackets (6, 7) are provided extending outward from the plate parts (4, 5) and fastened together to join the plate parts to each other in such a manner that the plate parts (4, 5) form the flange parts of the support frame (2) and the fastening brackets (6, 7) form the web of the support frame (2).