The surface properties of fullerenol C₆₀(OH)₂₀ solutions differ significantly from the properties of solutions of more hydrophilic fullerenols. At concentrations below 1 g/l, dynamic surface elasticity proves to be very high (up to 300 mN/m), while surface tension decreases only slightly. The adsorption layer is very sensitive to mechanical perturbations of the solution surface, and surface elasticity decreases under surface compression. The adsorption layer is macroscopically homogeneous but contains microscopic aggregates. The layer can be easily transferred from the liquid surface onto a solid support.