Rhizobium spp. (local isolate) was used to inoculate three bean (Phaseolus vulgaris L.) varieties; Akman 98, Göynük 98 and Şehirali 90, in a factorial field experiment. The objective of the experiment was to study effect of inoculation on seed yield protein range, seed weight, non-soaker capacity and hydration index. Rhizobium spp. inoculation and nitrogen fertilizer significantly increased characters tested. This study revealed that inoculation with Rhizobium spp. improved seed quality. © 2008 Asian Network for Scientific Information.