The object of the present invention is to provide a novel inflammasome inhibitor capable of inhibiting the activation of inflammasome. In view of the inhibition of the released amount of IL-1[beta] produced by the stimulation of ATP, palmitic acid, MSU and Poly (dA:dT) from arctigenin and the inhibition of the amount of caspase-1 activation, the inventors of the present invention have discovered for the first time that arctigenin has an effect of inhibiting the activation of inflammasome. The present invention provides an inflammasome activation inhibitor which comprises arctigenin and/or arctiin as main ingredients.本發明的目的係提供一種能夠抑制發炎體活化之新穎的發炎體抑制劑,從牛蒡苷元抑制藉由ATP、棕櫚酸、MSU及Poly(dA:dT)刺激時所產生之IL-1β的放出量及抑制胱天蛋白酶-1活化的量來看,本發明人們嶄新地發現牛蒡苷元具有抑制發炎體活化的作用。本發明係提供一種發炎體活化抑制劑,其係含有牛蒡苷元及/或牛蒡苷作為主要成分。