Good production results are guaranteed by an appropriate genetically determined features of cows, breeding factors, good sanitary conditions and production methods as well as the quality of roughages. Silages of poor quality, often contaminated with pathogenic bacteria and toxinogenic moulds may directly affect the health of dairy cows, and thus reduce the quality and quantity of milk produced by them. Aim of this study was to evaluate the quality of raw milk in selected organic farms, which was collected from cows fed with silage from meadow sward prepared with the addition of starter culture of bacteria from the genus Lactobacillus or prepared by spontaneous fermentation. It was confirmed that the addition of bacterial starter culture in the process of ensiling has a positive impact on physicochemical and microbiological quality of roughages. Moreover, the milk from cows fed with silages of a very good quality was characterized by lower content of the total count of microorganisms, lower number of somatic cells and the amount of aflatoxin M1 in relation to milk collected from cows fed with silages of satisfactory quality. Based on the results there is shown a possibility of connection between the quality of roughages and selected quality parameters of raw milk.