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The synthesis and characterisation of the new endohedral cluster fullerene Sc₃CH@C₈₀ is reported. The encapsulation of the first hydrocarbon cluster inside a fullerene was achieved by the arc burning method in a reactive CH₄ atmosphere. The extensive characterisation by mass spectrometry (MS), high‐ pressure liquid chromatography (HPLC), ⁴⁵Sc NMR, electron spin resonance (ESR), UV/Vis‐NIR and Raman spectroscopy provided the experimental evidence for the caging of the five‐atom Sc₃CH cluster inside the C₈₀ cage isomer with icosahedral symmetry. The proposed new structure was confirmed by DFT calculations, which gave a closed shell and large energy gap structure. Thus a pyramidal Sc₃CH cluster and the I_h‐C₈₀ cage were shown to be the most stable configuration for Sc₃CH@C₈₀ whereas alternative structures give a smaller bonding energy as well as a smaller energy gap.