Abstract: Background and Objective: Drought stress is one of the most common environmental stresses. It can affect productivity and growth characteristics of plants in different growth stages. The role of mycorrhizal symbiosis to protect plants in drought condition is considerable. The aim of this study was to improve growth parameters of mung bean by Mycorrhizae and Pseudomonas symbiosis as a natural technique under drought condition. Materials and Methods: This experiment was carried out in Research Farm of Islamic Azad University, Miyaneh branch, during summer 2016 based on split plot in Randomized Completely Block Design with 3 replications. Experimental plots were drought stress which includes; stopping irrigation in flowering stage, stopping irrigation in pod setting stage and normal irrigation. Inoculations as a second factor were included; non-inoculation (Control), inoculation with Glomus mosseae, Pseudomonas fluorescens 169 strain and Glomus mosseae+Pseudomonas fluorescens 169 strain. Analysis of data was performed using MSTATC and SPSS software. Results: There were significant variation (p<0.05, p<0.01) for drought stress treatments based on the majority of growth parameters and for inoculations except the number of leaves per plant, fresh weight of leaves and stem diameter. Drought stress reduced the majority of growth parameters of plant. As plant height Raised in drought imposed condition, the number of branches increased and caused increase in weight of plant. Traits included dry weight of stem+pod, dry weight of leaves and dry weight of plant explained 27.449% of total variations. Conclusions: It was concluded that inoculation of Glomus mosseae was more effective in increasing growth characteristics of mung bean. Pod formation stage was the most vulnerable growth stage of plant based on necessity for irrigation. Soil microbial could alleviate drought stress effects through enhancement plant height directly and dry weight of stem+pod, dry weight of leaves and dry weight of plant indirectly.