The present communication gives a preliminary description of the isolation of a new alkaloid from Amanita muscaria L. besides muscarin and acetylcholin. The constitution of this base, called muscaridin, is established as the quaternary trimethylammonium salt of 6 amino‐2,3‐dihydroxy‐hexan. Copyright © 1960 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim