This work investigated the potential of two concentrations  of H₂O₂ (0.10 and 0.20 mM) applied through irrigation water, as a priming factor, in reducing the detrimental effects of soil salinity stress on wheat (Triticum aestivum L.). Two wheat genotypes, Gemaiza 9 (G9) as a moderately salt sensitive and Sakha 93 (S93) as a salt tolerant, were grown in pots containing a saline clay soil (EC_e of  7.35 dS/m) under greenhouse conditions for 45 days. The obtained results showed that H₂O₂ application at  0.10 and 0.20 mM stimulated the germination of G9 genotype by 10 and 20%, respectively. Both fresh and dry shoot weights of G9 had increased by 9.92 and 7.70 and 8.52 and 8.2% for 0.1 and 0.2 mM H₂O₂ treated plants, respectively, as compared to control treatment. In contrast, In S93 genotype, negative effects on germination and fresh and dry weight were recorded. The irrigation with 0.1mM H₂O₂-treated water markedly increased the tillers to about 100% and 22.2% in G9 and S93, respectively, while 0.2mM H₂O₂ treatment increased the tillers number to 28.6% more in G9 and decreased it 16.7% in S93. Addition of 0.2 mM H₂O₂ had a negative effect on chlorophyll A content in both cultivars. In G9, chlorophyll B and carotene content were promoted particularly by 0.2mM H₂O₂. Significant decreases in Na⁺ content in both cultivars were observed with H₂O₂ application while potassium was not markedly affected. The K⁺/Na⁺ ratio of G9 was lower than that in S93 in all treatments and tended to increase in both genotypes with H₂O₂ applications. It can be  conducted that application of H₂O₂ as a physiological priming factor may play a significant role in growth improvement of moderately salt sensitive wheat genotypes such as G9 through promotion of Chlorophyll B synthesis and reduction of Na⁺ content.