Glass fiber reinforced polymers (GFRP) reinforcemen t bars has a lower stiffness than steel reinforcement, which should be accounted for the ul timate and serviceability conditions, including the impact on member deflection and crack widths. T his paper presents an experimental study of the flexural behavior of concrete beams reinforced with locally produced glass fiber reinforced polymers (GFRP) bars. The bars are locally produced by doubl e parts die mold using local resources raw materials. A total of seven beams measuring 120 mm wide x 300 mm deep x 2800 mm long were caste and tested up to failure under four-point ben ding. The main parameters were reinforcement material type (GFRP and steel), concrete compressiv e strength and reinforcement ratio ( μ b , 1.7 μ b and 2.7 μ b ). The mid-span deflection, crack width and GFRP re inforcement strains of the tested beams were recorded and compared. The test results reveal ed that the crack widths and mid-span deflection were significantly decreased by increasing the rein forcement ratio. The ultimate load increased by 47% and 97% as the reinforcement ration increased f rom μ b to 2.7 μ b . Specimens reinforced by 2.7 μ b demonstrated an amount of ductility provided by the concrete. The recorded strain of GFRP reinforcement reached to 90% of the ultimate strain s.