A new lanostanoid triterpene, named ganoderitriol M (1), together with a known triterpene ganoderic acid epsilon (2), were isolated from the fruiting bodies of G lucidum. Compound 1 was deduced as (24S)-lanosta-7-oxo-8-en-3beta, 24, 25-triol on the basis of spectral analysis (UV, IR, MS, 1H NMR, 13C NMR and 2D NMR).