The amino acid composition of total protein in sheep milk obtained from ewes of Tsigai breed during the grazing season (April - July) in 2002 was determined. The variation in the amounts of total protein and the dry fat-free residue in the milk produced during the grazing season exercise impact on its amino acid composition. Generally, sheep milk had higher percentage of monoaminocarbonic acids ranging from 13.1% to 13.4%. The total amount of essential amino acids increases proportionally to the changes in the milk composition during the grazing season.