Milk presents very convenient environment for multiplying of microorganisms from the surroundings or from udder itself. To obtain milk correct in hygienic sense, except health milk glands, environmental factors which could contribute to additional milk contamination are important too. Failures in hygiene of milk, milkmen, milking environment or milking machines, as well as their technical accuracy, have primary importance in occurrence of udder diseases and therefore in milk quality too. In this paper, the mentioned factors were examined on the farm with free keeping of cows, where they were milked in a milking parlour. Results obtained by the observation and estimation of corresponding procedures are satisfactory on the whole, but correction of the existing failures could contribute to better health condition of udder, better production results and improvement of hygienic quality of milk.