The amino acids in the liver of chick embryo was analysed for ages (7, 11, 14 and 19) days incubation and small chicken aged (14) days after hatching and adult. The study recorded (18) amino acid, the highest concentration of amino acids in the liver of embryo age (7) days incubation was Cysteine (Cys) and in small chicken aged (14) day after hatching, the following amino acids were found: Asparagine (Asn), Alanine (Ala), Histidine (His), Threonine (Thr), Valine (Val), Lysine (Lys), as well as in adult the following amino acids were recorded the highest concentration: Aspartic (Asp), Glutamic (Glu), Serine (Ser), Arginine (Arg), Proline (Pro), Glycine (Gly), Tyrosine (Tyr), Methionine (Met), Isoleucine (Ile), Leucine (Leu) and phenyl alanine (Phe). The lowest concentration of the amino acid was in embryo age (14) day incubation and include: Asparagine (Asn), Alanine (Ala), Glycine (Gly), Threonine (Thr), Tyrosine (Tyr), Valine (Val), Methionine (Met), histidine (His), Isoleucine (Ile) and Leucine (Leu), as well as at embryo age (19) day incubation which were: Serine (Ser), Cysteine (Cys) and Proline (Pro), whilethe low concentrations of amino acids include: Aspartic (Asp), Glutamic (Glu), Arginine (Arg) and Phenyl alanine (Phe).The statistical findings showed high significant differences between all ages mentioned and the amino acids except for lysine amino acid (Lys), which did not show any significant differences among all ages.