In order to develop a new supramolecular complex for use as an active drug carrier, we prepared complexes of an anionic liposome comprising poly(ethylene glycol) (PEG(n=50)) monooleyl ether with folate-conjugated poly(amidoamine) dendrimers (FA-PAMAM). Regardless of the ratio of FA-PAMAM to liposome, the complexes were stably dispersed in water. These results suggest that the PEG chains play an important role in the dispersion stability of the supra-complexes, preventing the complexes from aggregating.