oil salinity is a major problem inhibiting crop production in arid and semi arid agricultural lands of Iran. Therefore, research on sustainable increase of plant production by physiologically increasing the plant resistance to salts and decreasing the salt accumulation in plants is essential in these saline soils. In this work the effects of potassium and boron nutrition on radish under different salinity levels were investigated. Radish commonly consumed as a fresh vegetable and also as a pharmaceutical plant. It contai ascorbic acid, calcium, potassium, copper, folic acid and antioxidants. The main objectives of this study were to investigate the effects of K and B interactions on dry matter yield, cell membrane permeability, carbohydrate content and some micronutrient uptake of radish under salinity condition. The experiments were setup in a three factor- completely randomized design with three replicates. The treatments were; potassium as 1, 4 and 8 mM, boron as 0.1, 0.2 and 0.3 mg/L and salinity levels as 1, 4 and 8 dS/m. The results showed that micronutrient concentration and uptake and membrane permeability in root were higher than shoot, but K and Na concentration and uptake and carbohydrate concentration were higher in shoot. The maximum fresh and dry matter yield in root and shoot, Mn concentration and uptake and carbohydrate concentration in root, and the minimum membrane permeability in root and shoot were observed in 8 mM potassium treatment. Also the maximum B, Fe, Zn, Cu and Mn concentration and uptake in shoot and maximum Na uptake of root were observed in 4 mM potassium level. The maximum K, B and carbohydrate concentration and also the maximum K, Na, B, Fe and Mn uptake and minimum membrane permeability in root were observed at 0.3 mg/L of B. The maximum K, Na, B, Fe and Mn concentration and minimum membrane permeability and maximum K, B, Fe, Zn and Mn uptake of root were obtained at 0.3 mg/L of B. The Fe, Mn, Zn and Cu concentration and uptake in root were higher at salinity of 4 dS/m than 8 dS/m. At 4 dS/m of salinity; the maximum yield, Zn concentration in shoot, Mn concentration in root and shoot and maximum B uptake in root, Zn uptake in shoot and Mn uptake in root and shoot were observed at 8 mM of potassium and 0.3 mg/L of B treatments. In salinity level of 8 dS/m, the maximum K and Mn concentration in shoot, carbohydrate concentration in root and maximum K, B and Mn uptake in shoot and B and Fe in root were observed at 4 mM of K and 0.3 mg/L of B. According to the results, it could be concluded that, the effects of K and B on the biomass, the nutrients concentration and uptake in root and shoot depend on the salinity, K and B concentration in nutrient solution and nutrient distribution between the root and shoot of the plants