To provide an amino group-containing polyglycol ester compound that is useful as a dispersant shows excellent fluidity and dispersion stability of fine particles of pigments in an organic solvent, and gives excellent gloss for a dried film.

The objective amino group containing polyalkylene glycol ester is represented by the following general formula (1) (wherein X is a polyalkylenepolyamine at least number (a) of active hydrogen atoms or a residue after removing number (a) of active hydrogen atoms from the polyalkyleneimine; R1 is H, methyl; R2 is a 2-4C alkylene; R3 is H, a 1-9C alkyl group or phenyl which may be substituted; n is an integer of 2-50; a is an integer of 1-200).