Salinity is one of the greatest factors that limit the growth of plants and production of crops. This topic has been of utmost importance since long ago. Current reports show that this problem is increasing. Cherries are plants which are sensitive to salt. The usual method to propagate cherries is producing of seedlings and grafting of suitable scion on rootstock. Cherry trees are mostly cultivated in flat areas where salinity may arise because of over fertilization and irrigation with low quality water. The salinity tolerance of fruit trees can be enhanced through the use of tolerant rootstocks. Therefore, according to the above mentioned limitations, a greenhouse study was arranged to assess the salt tolerance of eight sour cherry ( Prunus mahaleb ) genotypes. A factorial experiment through complete randomized design (CRD) with four replications and four levels of salt including 0, 20, 40 and 60 mM NaCl with electrical conductivity of 1.294, 3.135, 5.383 and 6.564 dsm -1 were used. By increasing the levels of salt, visible damage, plant height and stem diameter, fresh and dry weight, relative water content (RWC), relative chlorophyll, chlorophyll florescence (Fv/Fm), photosynthetic rate (A), stomata conductance (gs), trairation (E) and potassium of root decreased. Being salty also increase electrolyte leakage, substomal chamber containing Co 2 , Na + concentration in leave and root, K + of leave and Na/k of leave and root. The result of comparison of the mean of growth parameters showed that there is a significant difference between various genotypes of sour cherry. Among of genotypes 249, 121 and 255 had the least and 139, 188 and 120 showed the most decrease in growth indexes of shoots and roots. The most RWC was in the 249, respectively. The least and most electrolyte leakage was seen in 139 and 249, respectively. About the relative chlorophyll content and chlorophyll fluorescence 249 had the most and 255 and 139 had the least amount, respectively. The most amount of proline content was observed in 187, however, 255 possessed the least amount of leaf proline. Related to gas exchange indexes 249 had the least changes compared to control, but 120, 139 and 188 had the greatest amount of decrease. The interaction effect of salt and genotypes showed that accumulation of Na + in leaves and roots was less in 121 and 139. The amount of K + in the leaves decrease in the low level of salt ( 20 mM) and increase in high levels of salt. 120 owned the most while 255 owned the least amount of potassium in their leaves. The amount of potassium in the root decrease in according with the increase of salt. The most amount of potassium in root was observed in 277 and 139 accumulated the least amount of potassium in their roots. Based on the results it was found out that 249, 277, 121 and 187 genotypes was more resistant to changes in the level of salt. But, 120, 139, 188 and 255were the most sensitive ones to salt. Key Words : Sour cherry, Prunus mahaleb , Genotypes, Salinity