a preview genotoxic biomonitoring was carried out from a random sample in workers daily exposed to pesticides. soy bean cultivation is the main activity of these rural workers from córdoba. the total chromosomal aberrations (ca)/100 cells in the exposed group was 11.50±4.33 and 7.71±3.45 including and excluding gaps respectively, statistically different (p<0.05) from the reference group (5.25±2.77 and 2.58±1.83). the most commonly pesticides used by the exposed group were glyphosate, cipermetrine and atrazine. the total amount of aberrant cells in the exposed group was 11.21±3.87 and 7.50±3.00 including and excluding gaps respectively, statistically different (p<0.05) from the reference group (5.08±2.71 and 2.58±1.83 ). these findings showed the risk factor that represents pesticides exposure to human health in the studied group, compared with the reference group.