Abstract: Response of mungbean (Vigna radiata L.) cultivar NM-98 to seed inoculation and different levels of fertilizer (0-0, 15-30, 30-60 and 45-90 kg N-P2O5 ha-1) was studied under field conditions. Number of pod bearing branches plant-1, number of seed pod-1, 1000-seed weight, seed yield and protein contents were affected significantly by seed inoculation. The application of fertilizer significantly increased the seed yield and maximum seed yield was obtained when 30-60 kg N-P2O5 ha-1 was applied. This increase in seed yield was mainly due to more number of pod bearing branches plant-1, number of seed pod-1 and 1000-seed weight. Seed protein contents were also increased significantly by seed inoculation and fertilizer application. Based on the present findings it can be concluded that mungbean cultivar NM-98 should sown after seed inoculation and given 30-60 kg N-P2O5 ha-1 for obtaining higher seed yield.