: The effects of soy beans on spermatozoa still been a controversial thing. Soy is one of the source of the Fitoestrogen because the structure isoflavon of soy is similar with the structure of estrogen molecule, so it can confound the balancial of hormone. Soy also as a source of protein that rich of amino acid arginin. The study was carried out to find the effects of soy bean milk on spermatozoa qualities. This experimental study was conducted to nine wistar rats weighing from 200 to 250 grams. These nine wistar rats were divide into 3 groups. Consists of control group (K) that did not gives the soy bean milk, the group 1 (P1) that gives the soy bean milk with dose 500mg/kg BB/day and the group 2 (P2) with dose 780mg/kg BB/day. Treatment carried out for 60 days. As a result, there is an improvement in consentration and morphology of spermatozoa which are statistically significant (p0,05). Conclusion: The higher dose of soy bean milk may rise the concentration, morphology and motility of spermatozoa wistar rats