<p>One of the promising ways to increase the luminescence intensity and stability of luminophores is the use of hyperbranched polymers as ligands due to their unique structure and physical and mechanical properties. The aim of this work is to synthesize, study the structure and properties of lanthanide complexes of hyperbranched polyester polysuccinate and to determine the influence of hyperbranched matrix on luminescent properties. In this connection, metal-polymer complexes with hyperbranched polyester polysuccinate and a model compound, the ethyl ester of 2,2-disuccinatomethylpropanoic acid, were synthesized for the first time. The structure of the ligands was proved by ¹H NMR, ¹³C NMR, IR and electron spectroscopy. It was found that in complexation with participation of carboxylate groups of hyperbranched polyester polysuccinate the structure of composition M: L = 5:1 is realized. Luminescence of the obtained polymer complexes in comparison with the initial ligand increased 18.5 times for Gd(III) complex, 1.7 times for Dy(III) and 14 times for Ho(III). The luminescence of the model substance complexes with Gd(III), Dy(III), and Ho(III) ions increased by 1.1; 3.4; and 2.7 times, respectively. The obtained results indicate the possibility of using hyperbranched polyester polysuccinates as matrices of luminophores.</p>