Corbels are structural members used as supports for beams and girders in RC structures. Corbels are short members with a shear span-to-effective depth ratio (a/d) of less than 2. Due to the presence of discontinuity regions and non-linear strain distribution across the section, it is proposed to analyse them by the Strut and Tie Method. Cracking of concrete around the main reinforcement of the corbels is very probable witch causes corrosion of steel reinforcement, therefore use of GFRP bars as main reinforcement can be helpful. Providing the sufficient development length is a main concern and use of headed GFRP bars is a common solution. Therefore, in this research, the behavior of concrete corbels reinforced with Headed GFRP bars has been numerically and analytically evaluated. Seven concrete corbels with a shear span-to-effective depth ratio (a/d) of 0.7, reinforced with headed GFRP main bars designed according to the Canadian code [1] while their crack-control reinforcement mesh designed according to the Canadian code [2] and evaluated numerically and analitically. The variable parameters were the diameter of the rebar and the compressive strength of the concrete. To verify the results, a laboratory model of a concrete corbel tested at Yazd University was used. Based on the results, the bearing capacity was dependent on increasing the concrete strength and rebar diameter, but the ductility was mainly related to increasing the diameter of the GFRP Headed bars. Also, using the STM method of Canadian Code [1], the corbel capacity was calculated and compared with the results of the laboratory sample and numerical samples, and it was concluded that the design was well conservative based on the STM method.