A pot experiment was conducted during the successive two summer seasons of 2008 and 2009 at a wire proof green house of Sakha Agricultural Research Station, Kafr El-Sheikh, governorate, Egypt. The experiment aimed to evaluate the effect of nitrogen fertilizer levels (N₀=without nitrogen fertilizer, N₁=10 kgN/fed, N₂=20 kg N/fed and N₃=30 kg N/fed) and three nitrogen fixing bacteria (Control=without inoculation, AZ₁ (Ga+650) and AZ₂ (Ga+500) as Rhizobium strains) on nodulation, yield and yield components of guar plant grown on three( sandy, calcareous and clay soils) kinds different soil types. The experiment was conducted in a spilt plot design with three replicates. The Obtained results indicated that nodules dry weight increased significantly by adding 30 kg N/fed in the sandy soil whereas 20 kg N/fed (N₂) gave the highest values of nodules dry weight with calcareous and clayey soil. 20 kg N/fed (N₂) gave 289.44 and 289.44 mg/pot with clayey soil during first and second season, respectively. Also, inoculation with AZ₂ increased significantly nodules dry weight with all soil types and the maximum nodules dry weight was 229 mg/pot with calcareous soil in the 1^st season and 228.58 mg/pot with clayey soil in the 2^nd season. In addition the interaction effect between nitrogen fertilizer and inoculation with nitrogen fixing bacteria in clayey soil gave the highest dry weight of nodules after 60 days with N₂AZ₂ (20kg N/fed combined with AZ₂) of (840 and 640 mg/pot). Seed yield was increased significantly over control due to supplying with either 30 kg N/fed (N₃) or AZ₂ to a clayey soil. The highest seed yield values were obtained with 30 kg N/fed (N₃) it gave 42.56 and 41.97 g/pot with clayey soil in the 1^st and 2^nd season, respectively. It was found that 20 kg N/fed gave the highest straw yield (117.73 g/pot) in the 1^st with clayey soil whereas adding Az2 had the highest straw yield was 100.53 g/pot in the 1^st season. Data also revealed that oil yield significantly increased with nitrogen levels and gave the highest yield with adding 30kg N/fed to clayey soil (4.45 g/pot) in the 1^st and 2^nd season, respectively. Also with AZ₂ the highest values of oil yield was 3.43 and 3.46 g/pot in the 1^st and 2^nd season.