This work is devoted to the microbiological analysis of meat and by-products of hazel grouse in the conditions of the Republic of Sakha (Yakutia), depending on the seasons. The material for the study was the carcasses and internal organs of hazel grouses, obtained in hunting brigades and hunters during the spring-autumn shooting of birds in the Republic of Sakha (Yakutia). Samples of muscle tissue, lungs, heart, liver, kidneys, the contents of the stomach and intestines of hazel grouses were taken from 29 birds for the isolation of E.coli, salmonella, staphylococci and Cl. perfringens. According to the research results, it was found that the intensity of bacterial contamination depends on the season, that the greatest contamination of E. coli, salmonella, staphylococci occurs in the spring, made it possible to determine the species composition of the microflora of the organs and tissues of hazel grouse by the seasons of the year.