The strain of Rhizobium galegae К- 3 - active symbiote of Galega orientalis has been received by means of selection. Positive influence of this strain on formation and functioning of symbiosis during the first and second years of cultivation of Galega orientalis plants is shown. R. galegae К- 3 promotes to formation of generous amount of indeterminate nodules on the roots, increase of activity of symbiotic nitrogen fixation and increase in the yield of Galega orientalis.