Based on snout-vent length ( SVL) frequency data 113 specimens of Teratoscincus roborowskii were preliminarily divided into six age classes. Then,age determination was evaluated by skeletochronology of 54 samples of the 3^rd section on the 2^nd fore-right phalanges selected from the six age classes. The result of age determination was evaluated by individual growth index measured from mark-recapture samples. Results indicated that there was no significant difference in SVL between male and female individuals,there was a strong correlation between SVL and skeletochronological data. By combining SVL with skeletochronological data,individuals of geckoes less than 6 years old can be identified by the technique of Skeletochronology.