Abstarct: Environmental pollution, particularly contamination of soil and water resources, resulting from the indiscriminate use of chemical fertilizers, caused contamination of foods and threats of human health. One of the strategies to improve the quality of agricultural products, soil, and remove pollutantts the use of organic fertilizers in agricultural products. Bean plants is a host of Mycorrhizal arbuscular fungi and nitrogen fixation bacteria. Accordingly, in order to study the effect of mycorrhizal fungi, nitrogen fixation bacter and nitrogen fertilizer on yield and yield components of red beans, a field experimental was conducted during growing season of 2010 at the Technology University Agricultural Research Station located in Bastam. The experiment was a factorial experiment in the baxse of randomized complete blocks design with three replications. The factors were mycorrhizal inoculation (inoculated and non-inoculated with glomus intraradices), nitrogen fixation bacter inoculation (inoculated and non-inoculated with Rhizobium leguminosarum) and nitrogen fertilizer (0, 75 ,125 kg/hr). Growth analysis and leaf dry weight were measured with intervals of 7-10 days. Yield and yield components were analyzed at the end of the experiment. The results showed that the main effect of mycorrhizal on all variables other than number of node, number of pods per plant, harvest index and soil phosphorus was significant. Mycorrhiza increased seed yield and biological yield, 12.88 and 13.28 percent compared with control respectively. The main effect of nitrogen fertilizer on all variables except for dry weight of the pods, number of seeds per pod, harvest index, seed phosphorus and soil phosphorus was significant. In most cases between 75 kg/hr and 125 kg/hr of fertilizer was not significant difference. So can use 75 kg/hr instead of 125 kg/hr advised. Nitrogen fertilizer reduced the mycorrhizal colonization of roots. The main effect of rhizobium bacteria on the number of nodes, seed weight, seed yield and biological yield was significant and increased all of them. Interactions between mycorrhizal and rhizobium bacteria in nodules, dry weight of pods, number of pods per plant and seed weight was significant. Application of AM fungi and bacteria with 125 kg/ha nitrogen fertilizer caused reduction of node dry weight, number of nood at 50% of flowering, but when 75 kg/ha nitrogen where used node dry weight and number of node increased. mycorrhizal fungi, rhizobium bacteria and nitrogen fertilizer, increased growth index compare to control. Mycorrhizal fungi and nitrogen fertilizer had a greater impact of the investigated variables in this experiment.