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Soil salinity has a negative effect on germination and seedling growth, therefore, it is preferable to ensure a high germination rate and strong early growth in saline soils in order to obtain the best productivity of grain crops. Gibberellic acid (GA3) is one of the most important plant growth regulators which decrease the effect of salinity A laboratory experiment was conducted to study the effect of Gibberellic acid (GA3) and some salinity levels on the germination of barley seeds, using a completely random design in three replications, where the seeds were treated before planting with Gibberellic acid at a concentration of 300 ppm (soaking for 24 hours), compared to soaking in distilled water (control) under the influence of different concentrations of NaCl salt (4000, 9000) ppm compared with control. The results of variance analysis (ANOVA) showed extremely significant (p < 0.05) when soaking barley seeds in Gibberellic acid (GA3) compared to control under different levels of NaCl concentration, as there was a positive effect on barley germination and root system where using Gibberellic acid such as germination energy (%), laboratory germination (%), germination force%, weight 100 feathers gr., weight 100 root gr., length feather (cm) and length roots (cm). Published by the International Journal of Agronomy and Agricultural Research | IJAAR