Two experiments were set to determine the seeds treatment practical effect on bean plant productivity (Phaseolus vulgaris L.). The following treatments were used: T1 (seeds treatment with 12g Mo, 2g de Co and 2g methionine/80kg of seeds), T2 (ditto to T1 concerning to Mo and Co),T3 (seeds treatment whith 2g methionine/80kg of seeds), T4 (seeds treatment with 2g vitamin B1/80kg of seeds) and T5 (control treatment). Nodulation, driy matter weight, N, S, Mo and Co content from aerial part and grains, protein content, physiologícal quality and productivity, were evaluated. In a general way, the different treatments performed, were not statistically significant under the evaluated parameters.