Abstract: Fission track dating of Layer 4 of the Peking Man Site has been made with ancient ashesleft behind by Peking Man in Layer 4 of the Site. A mineral- - -sphene- -has been separated fromthe ashes and well-annealed sphene grains have been used to date Layer 4. The result is 0.29910.055 Ma (age of Layer 4), which is in agreement with the results of thermoluminescence datingand U-series dating. From fission track dating, an inference that the duration from Layer 10 toLayer 4 was about 0.153 Ma has been drawn.

Key words: Fission track dating; The Peking Man Site; Ancient ashes; Sphene; Duration of living