Nanoparticles of C-60, prepared by hand-grinding bulk solids in an agate mortar, were found to disperse stably in various organic solvents, in which molecular solubility of C-60 is negligibly small. The resulting dispersions contained the C-60 nanoparticles, whose average size varies between 200 and 300nm depending on the solvent. The C-60 concentrations in the dispersions were an order of magnitude higher than those prepared by the conventional methods.