Determination of leaf water content was made on the "Saline"crops, using rice, wheat, barley and naked barley, grown in sand culture. The saline cultures were done by the solution to which NaCl had been added so as to become the critical concentration for their growth. Considering data from all saline cultures with the multifarious ecotypes induced by various varieties, various nutrient deficiencies or different growing stages, the differences in leaf water content were apparent, but the average decreases of water content were as small as 0.72 to 1.50%. And also the changes of leaf water content in green part (the basal part obviously uninjured) in leaves where the burn symptom began to develop, the changes in every part on an uninjured leaf and the changes in leaves classified according to leaf-order were just the same as before. Moreover, the differences in water content at various hours in a day were also small as stated above and the hourly variations in leaf water content in the saline cultures were a little more than in the non-saline cultures. It may be said in summary that although the incipient drying resulted from salinization in rhizosphere seems to be concerned with the osmotic inhibition effect, the specific features and the details of the progressive mechanism of saline injury still remain obscure