A pot experiment under greenhouse conditions was conducted in clayey loam and sandy soils to evaluate the effect of Pseudomonas fleuroscens (PS) or Saccharomyces cerevisiae (Ye) on the efficiency of R. leguminosarum bv. viceae (Rh) to nodule and fix nitrogen in faba bean plants.  Significant increase of rhizobial nodules number and nodules dry weight was recorded with mixed cultures of Rh, Ps and Ye in clayey loam soil in comparison with rhizobial inoculated plants. While, non-significant increase was recorded in sandy soil.  High significant increase of nitrogenase activity was obtained with mixed cultures of Rh, Ps and Ye in either clayey loam or sandy soils (115.6 or 119.5 mmole g^-1 dry nodule hr^-1). Consequently, high nitrogen content of faba bean plants was determined (416.6 and 392.2 mg nitrogen/plant).