Single-stage plasma-arc synthesis of metallo-endofullerences of the types C₆₀Pd, C₆₀Ni, and C₆₀Cr, whose content in a mixture of extracted fullerenes was 0.05 to 0.15 wt %, was performed. The effect of introduction of these metals into the reaction plasma on the total yield of fullerenes and on the fraction composition of the fullerene mixture was studied. The fullerene mixtures were analyzed by mass spectrometry and liquid chromatography.