Abstarct: Environmental pollution, particularly, the contamination of soil and water resources, resulting from the indiscriminate use of chemical fertilizers, caused threats of human health. One of the strategies to improve the quality of agricultural products, soil, and remove pollutant is the use of organic fertilizers in agricultural products. In order to study the effect of Mycorrhizal fungi, Vermicompost and Humic acid on qualitative and quantitative characteristics of cowpea plant (Vigna unguiculata L.), an experimental field was conducted during growing season of 2011-2012 at the Technology University Agricultural Research Station located in Bastam. The experiment was a factorial experiment baxsed on randomized complete blocks design with three replications. The factors were Mycorrhizal inoculation in the two levels (inoculated and non-inoculated with glomus intraradices), Vermicompost in the three levels (0, 3 and 6 ton/hr) and Humic acid in the two levels (Non-use and use of Humic acid). Plants inoculated with Mycorrhizal fungi increased shoot dry weight, pod length, number of lateral shoots, root colonization and chlorophyll b content of leaf. Application of Humic acid increased the percentage of root colonization and chlorophyll b content of leaf. Application of Vermicompost increased the dry weight of stem, leaf and pod, pod length, number of seeds per pod, the chlorophyll b. In most cases, between the use of 3 ton and 6 ton/ha Vermicompost was not a significant difference. Combined inoculation of Vermicompost and Humic acid increased the leaf dry weight. Combined inoculation with Mycorrhizal fungi and Vermicompost increased shoot dry weight, pod length, number of lateral shoots, root colonization, stem diameter, seed yield and biological yield. Chlorophyll b, cowpea seed protein percent and nitrogen percent At the time of application Mycorrhiza and Humic acid increased. Application of Triple Mycorrhizal fungi, worm compost and Humic acid increased the leaf dry weight and number of lateral shoots.Vermicompost fertilizer , Mycorrhizal fungi and Humic acid increased growth index compared to control . In the meantime Vermicompost fertilizer had greater impact on growth index.