Element concentration and the organic matter synthesis were studied in five sunflower inbreds. Plant material was obtained from the Institute of Field and Vegetable Crops, Faculty of Agriculture, Novi Sad. The sunflower inbreds were characterized by the same growing season. The plants were grown by the method of water cultures using various concentrations of nutrient solution (1/8 and 1/2 strength of that described by Reid-York sewing as control (1), and 2 and 3 times higher than the control solution). Dry mass of above-ground part and root, as well as concentration of certain elements of mineral nutrition were examined. The results obtained show that dry mass of above-ground part and root depended upon inbred line and variant of mineral nutrition. On average, the highest dry masswas found in the inbred O-CMS-3l, the lowest in O-CMS-25 and O-CMS 41. Also, significant differences in concentration of the elements analyzed, depending on inbred line, were established. On average, the highest N concentration was recorded in the line O-CMS-31, the lowest in O-CMS-6, the lowest in O-CMS-21. Also, concentration of N, P, and K in plant tissue increased as concentration of all elements in nutrient solution increased.