In the article are shown the materials of estimation of cows of Holstein breed on milk productivity for I-III finished lactations. It was found that the cows for the first lactation had a milk productivity at the level of 85% from the fullaged cows (at a rate of 70-75%), which amounted to an average of 8980.2 kg of milk with a fat content of 3.83%. Milk productivity of cows of III lactation averaged 10530.1 kg of milk. The parental index was at the level of 9720 kg by milk yield and 4.27% by fat content. Realization of genetic potential for milking of first-calves was 8980.2 kg, and cows for II-III lactation - 10081.8 and 10530 kg of milk, respectively. It was marked the cow nr. 5736, from which for 7 completed lactations (2135 days) was received 65274 kg of milk, the average daily milk yield for the whole period was 30.5 kg of milk.