Biocontrol efficiency of plant growth promoting rhizobacteria belong to Bacillus genus against bacterial foot rot of rice.  Biological control of bacterial foot rot of rice caused by Erwinia chrysanthemi was carried out at the department of Plant protection, Cantho University. Three Bacillus strains, named B57, B54 and B128.2, had been strong and stable in vitro antagonistic ability, against three strains of E. chrysanthemi, e.g. E_AG, E_CĐ, and E_BT with bacterial suppressive radius being 8.14mm, 7.57mm and 7.52 mm, respectively, extending up to 7 days after testing were selected for biocontrol of bacterial foot rot of rice. In the nethouse conditions, two strains named Bacillus B54 and B128.2 had provided a higher effectiveness, and B57 was equivalent to Starner 20WP in control of foot rot disease of rice. Bacillus strains B54 or 128.2, when applied two sprays (one prior and plus one after inoculation), has effectively reduced disease incidence, that being 37.87% and 38.01%, respectively, meanwhile that of untreated control being 72.69%.