By means of TLC-densitomery, the contents of oleanolic acid extracted from the fruits of Ligustrum lucidum were determined to be 8.04% (g/g) in the unriped fruit collected in August and 2.73% (g/g) in riped fruit gathered in December. This result showed that the oleanolic acid content in fructus L. Iucidum decreases gradually with growing until the fruit is fully riped.