In the present work, trace elemental analysis of mace (Myristica fragrans Houtt) was carried out by the atomic absorption spectrometry technique. The concentrations of various elements analyzed in this medicine were ranked in decreasing order: selenium (Se) > zinc (Zn) > magnesium (Mg) > iron (Fe) > calcium (Ca) > manganese (Mn) > lead (Pb). The concentrations of Mg, Zn, Fe, Mn, Ca, and Se were significantly decreased in serum of methylcholanthrene tumor models (P < 0.001) compared with the control and mace groups. It is consistent with the result of tumor incidence. These trace elements could be directly or indirectly responsible for the antitumor activity of mace. The inorganic elements in this folk remedy can partly account for the antitumor.