Biomass of all the inoculated plants of cluster bean increased significantly in terms of fresh and dry shoot weight (Table-1). AM inoculated plants grew markedly better over control under different salinity level. The fresh and dry weight of shoot was found to be maximum at 4 dSm-1 salinity level in dual inoculation of G. mosseae and A. laevis followed by the G. mosseae. Maximum fresh and dry weight of root was found in G. mosseae alone at lowest salinity level (4 dS m-1). Similarly at higher salinity level i.e. 12 dS m-1 increase fresh and dry weight of shoot in dual inoculation of G.mosseae + A. laevis. Similar better results were obtained in case of root biomass at 8 dS m-1 and 12 dS m-1. Inoculation of soil with AM fungi alone or in combination markedly improved the dry matter over control. Similar results were also obtained on tomato (Al- Karaki and Hammad 2001), cotton (Feng and Zhang 2003) and barley (Mohammad et al. 2003). This increment may be due to more absorption of nutrients especially P via an increase in root surface area through AM fungi (Prakash et al., 2011) and ability of plants for replacement of K by Na (Haijiboland et al. 2009). Under saline soil, greater CO2 assimilation could adequately provide carbohydrates for the fungal partner and results in more benefits to plants from AM association. These AM isolates from saline soils have a better ability to improve the survival, growth and ultimately biomass of host plants (Tain et al. 2004).