Metathetical coupling of an eta(5)-fullerene ruthenium complex Ru(eta(5)-C60Me5)Cl(CO)(2) and sodium cyclopentadienide gives a molecular hybrid of ruthenocene and fullerene, Ru(eta(5)-C60Me5)(eta(5)-C5H5) (bucky ruthenocene), the structure of which was determined by spectroscopic and crystallographic analyses. The molecule shows unique reactivity among known ferrocene and ruthenocene compounds.