The ewe’s milk with normalized fat content (0,0%, 4,5%, and 6,0%) was converted into yoghurts with yoghurt starters – Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus. The selected quality parameters of the raw milk and yoghurts after 1, 7 and 14 days of storage at 4°C were evaluated. The analyses of yoghurts included the sensory evaluation and the determination of pH, titrable acidity as well as the content of diacetyl, acetaldehyde and free fatty acids. The quality parameters of yoghurts differed according to the fat content and storage time. Non fat yoghurts obtained the best sensory evaluation.