Considering Iran and Azerbaijan as origin countries in Astara region and in order to study the effects of salt stress (NACL) on proline, Na and Chlorophyll Contents of 8 maize cultivars were experimented in three replications on the basis of randomized complete block design. Cultivars included K3615/1, S. C704, B73, S. C302, Waxy, K3546/6, K3653/2 and Zaqatala and they were cultivated in two pieces of land in Astara: one with normal soil and the other with salty soil. During the experiment, proline, leaf relative water content (LRWC), Chlorophyll a and Chlorophyll b contents were measured. Results showed that, regarding proline, Chlorophyll a, Chlorophyll b, total chlorophyll, Na content, plant biomass and yield, there were significant differences between cultivars in combined analysis under normal and salinity conditions, but leaf relative water content (LRWC), there weren't any significant differences between cultivars. Leaf chemical analysis of different maize cultivars indicated that sodium (Na) content was increased under saline condition. Maize cultivar S. C704 and zaqatala showed higher accumulation of proline than others but was not observed significant difference between them. The least proline content was observed in B73 that didn’t have any significant difference with S. C302, K3615/1and K3545. 6. The greatest biomass was recorded in Zaqatala, B73 and S. C704 that was never noticed significant difference between them.