In order to study the mechanism of the parts of omiza (Schizandra chinensis baillon) on metabolism in normal rats, the metabolites and enzyme activities both in serum and liver were determined. The rats were treated with water extract of the parts of omiza and the results showed a significant decrease of GOT, Glucose (excepted for water extract of fruits), Urea nitrogen, and increase of LDH in serum. Free fatty acid level tended to decrease in serum of rats treated with water extracts of fruits and endocarps and increase in seeds extract treated group. Serum GPT level was unchanged. The level of hapatic metabolites and enzyme activity showed a significant increase, but Pyruvate level was not significantly decreased.