ABSTRACT: Salt stress is one of the most serious limiting factors for crop growth and production. In this study, the morphological and biochemical changes of black gram (Vigna mungo L.) under NaCl stress were investigated. The black gram seeds were treated with various concentrations viz., control, 10, 25, 50, 75, 100 and 150 ppm of NaCl. The well grown plants were utilized for analysis of various morphological and biochemical parameters. The morphological growth parameters such as germination percentage, seedling growth and photosynthetic pigments were decreased with increasing concentration of NaCl treatment, while metabolites such as sugar, protein, and proline content were increased at increasing concentrations of NaCl. This investigation demonstrated that decreasing of growth parameters and photosynthetic pigments was due to low osmotic potential at intracellular level generated by NaCl stress.