High salinity is an environmental problem affecting seed germination, seedling growth and seed yield in plants. The experimental design was factorial arranged in a completely randomized design (CRD), with four replications. The first factor was soil electrical conductivity levels (1.1, 2.4, 4.9 and 6.7 dS.m-1) and the second factor was mung bean cultivars (Parto and Pakistani). Soil electrical conductivity increasing, decreased mung bean dry weight, shoot height, photosynthesis rate, chlorophyll a and b content, K+content and K/Na ratio but increased cell membrane damage, antioxidants enzymes activates and  Na+ content. In the both cultivars minimum shoot weight obtained from Parto cultivar and 6.7 dS.m-1 .The highest Na+ concentration was observed in Parto cultivar under 4.9 and 6.7 dS.m-1treatment. Stress condition increased cell membrane damage and maximum lipid peroxidation obtained from Parto cultivar under 6.7 dS.m-1. 2.4, 4.7 and 6.7 dS.m -1 soil electrical conductivity, decreased K/Na ratio to 1.1, 0.6 and 0.13  in Parto cultivar.  At highest soil electrical conductivity level, Pakistani cultivar had maximum shoot dry weight , photosynthetic rate  and K/Na ratio  and these results indicated Pakistani cultivar was salt tolerant cultivar compared to Parto cultivar.