Dried sclerotia of Wolfiporia extensa has a long history of medicinal uses in Asia and also is a traditional snack in Beijing that is called “fuling jiabing”. This study aimed at providing and evaluating data on total Hg contents of sclerotia collected across of the Yunnan land in China, which is generally lacking information. Sclerotia of W. extensa showed a low contamination with Hg when compared to fruiting bodies of many mushroom species. The Hg contents ranged from 0.004 1 to 0.019 mg Hg per kg dry matter with a median value of 0.011 mg·kg-1 dry matter and an overall mean value of (0.011±0.004) mg·kg-1 dry matter. Mercury content of sclerotia varied between the places of collection in mountainous Yunnan. Assessed intake of Hg by adult eating 50 g of the “average” Yunnan’s origin sclerotia contained in the “Fuling jiabing” snack could be between 0.000 009 2 and 0.000 55 mg per capita or between 0.000 003 4 and 0.000 016 mg per kg body mass for a typical adult of mass 60 kg, which is a low intake and Hg intakes would even be much less if taking decoctions of sclerotia. This study has revealed that sclerotia of W. extensa showed a weak contamination with Hg and possible Hg intake eating sclerotia of W. extensa is below health limits. Also Hg intake from the decoctions of W. extensa is much below health limits and “fuling jiabing” snack made of sclerotia of W. extensa provides little Hg.