The content of micro inorganic compounds in the 145 kinds of crude drugs on market was determined with Model 207 Atomic Absorption Spectrophotometer and Model 306 Flameless A.A. Content of Fe, Cu, Ni, Mn, Cd, Cr, Sn, and Pb was examined and the results revealed that the crude drugs which are using as a hematics and emmenagogues contained high content of iron, and those which are using as a antiinflammatory and emmenagogues contained high content of copper. Aromatic stomachics contain manganese and zinc, and diuretics and antiinaflammatory agents do tin. High content of Ni was found in tonics, but chronium and cadmium were not detected in crude drugs. There were no differences of content of trace metals in the various site of plants used.