The present work was carried out during two successive autumn seasons of year 2004 and 2005 in unheated plastic house (40 X 8.5 m) at the Experimental Station, Faculty of Agriculture, Cairo university, Giza, to study the response of two snap bean (Phaseolus vulgaris,L.) cultivars, namely Bronco and Pulista,  to inoculation with symbiotic bateria  Okadine (Rhizobium leguminosarum biover phaseoli ) and non   symbiotic nitrogen fixation bacteria Rhizobacterin (containing Azospirillum + Azotobacter). The experiment included 20 treatments which were a combination of two cultivars, and ten combination treatments between nitrogen fixation bactertia  and five levels of nitrogen fertilizers (0, 10, 20, 30 and 40 kg N/feddan). Pulista cv.  surpassed cv, Bronco in plant yield, number of branches,  pod length, leaves contents of N and K  and pods content of K, whereas the reverse was true concerning  plant yield, total yield, diameter of pod, leaves content of P  and pods content of carbohydrate. Using  Okadin + 30 kg N/feddan treatment increased  fresh weight of Bronco plants as compared with using nitrogen at level of 40 kg N, and increased yield per plant and feddan as well as N and P content in leaves and pods, respectively in both cultivars. Inoculation bean plants with a mixture of two the biofertilizers, in addition to fertilizing plants with mineral nitrogen at 10, 20 or 30 kg N/feddan promoted plant fresh weight, especially in cv. Pulista, and led to significant increase in early and total yield per plant and feddan.  Meanwhile,  the treatment of Okadine + Rhizobacterin  + 20 kg  N/feddan significantly increased in N and P contents in leaves significantly raised pod contents of N ,P and K. and showed markedly higher pods content of carbohydrate than control. There was also a significant increase in fiber content due to using Okadine + Rhizobacterin + 0 kg N/feddan treatment as compared with the control treatment.