Ternary complexes C 60-tetraphenylporphyrin-poly(vinylpyrrolidone) were synthesized and characterized. The synthesis of these complexes provides a fivefold increase in the amount of water-soluble C60 compared to complexation of C 60 with poly(vinylpyrrolidone). Using the methods of 13C NMR spectroscopy and small-angle neutron scattering, it was shown that complexation occurs in a C60-tetraphenylporphyrin binary system; the composition of the C60-tetraphenylporphyrin (1:1) complex was established from isothermal translation diffusion measurements. According to hydrodynamic and electro-optical studies of ternary C 60-tetraphenylporphyrin-poly(vinylpyrrolidone) systems, the polymer coil involved in the complexes of interest exhibits a higher symmetry compared to free poly(vinylpyrrolidone). It was found that an increase in the content of C60 in the ternary complex leads to the appearance of aggregates in its aqueous solutions.