Abstract: Background and Objective: In order to improve the growth and resistence maize (Zea mays L.) under soil salinity, application of seed priming and mycorrhiza that can be beneficial for a better alternative, once it increases the production of some antioxidants, the balance of sodium and potassium, reduces the absorb of sodium in plant and increase the emergence rate and emergence percentage in plants under soil salinity. This study aimed to evaluate the effects of seed priming and mycorrhiza on improving the balance of sodium and potassium and some changes in antioxidants in the leaves of maize under soil salinity. Materials and Methods: This combined analysis experiment was laid out in a randomized complete block design as factorial with three replications in both year and place of saline and non-saline on hybrid corn NS640. The tertiary factor was inoculation and non-inoculation with mycorrhiza years places (Glomus mossea), the fourth factor was priming with NaCl solution, salicylic acid, tap water and non-prime (control). The proper solutions concentration and priming duration were determined in separate experiments. Two-way analysis of variance was done using the PROC GLM procedure of the SAS. Results: The results showed inoculation with mycorrhiza and seed priming treatments in comparison to non-inoculation and non-prime the enzymes catalase and peroxidase, superoxide dismutase, soluble proteins and potassium increased in leaves in both places and maximum of these characteristics were obtained by seed priming with salicylic acid and inoculation with mycorrhiza especially in saline soil. The sodium amount in inoculation with mycorrhiza and prime with salicylic acid, than non-prime and non-inoculation in both places was decreased specially in saline environment. Colonization percentage and rate of emergence has been increased in inoculation with mycorrhiza and prime with salicylic acid in both environments, specially in non-saline environment. Conclusion: Maize seed priming with salicylic acid and inoculation with mycorrhiza play an important role in the plant response to salt stress.