In the article are presented data on the quantitative variations of bound amino acids in the tissue protein of the nematode Ditylenchus dipsaci Kuhn, 1857, parasite of Allium sativum crops. It was revealed that the largest share is: glutamic acid + glutamine -21.0% of the total amount, aspartic acid + asparagine - 11.0%, glycine -12.6% and alanine -10.5. In smaller quantities was evidenced: tryptophan (0.8%), histidine (0.8%) and methionine (0.1%). According to the distribution by groups, it was determined that non-essential amino acids have the highest percentage of the total -31.9%, followed by immunoactive amino acids - 25.7% and glycogen - 21.5%.