This study was conducted to investigate the effect of bioferilizer (Pseudomonas fluorescens and Azotobacter chroococcum) on growth of cabbage (Brassica oleracea L. var. capitata), the experiment was carried out at the experimental farm of soil laboratory belong to Directorate of Diyala Agriculture, Iraq during 2017, the experiment included three levels of bio fertilizers 0.08, 0.14 and 0.28 g/plant, it was laid out in randomized complete block design having four treatments with four replications. The results showed a significant increase in cabbage yield in treatments that inoculated with biofertilizer. The highest increase in yield of cabbage (plant weight, head weight, total plant weight (ton\acre) and total head weight (ton\acre)) was achieved in Biofertilizer 0.14 g/plant was reached 1262.375 g, 810.025 g, 14.026 ton\acre and 9.000 ton\acre respectively followed by Biofertilizer 0.28 g/plant, 1113.125 g, 757.875 g, 12.367 ton\acre and 8.421 ton\acre respectively and Biofertilizer 0.08 g/plant, 1000 g, 700 g, 11.111 ton\acre and 7.777 ton\acre respectively as compared with control 731 g, 363g, 8.122 ton\acre and 3.883 ton\acre respectively .