Abstract: A mandible of Pacoloxodon with chopped trace was unearthed from the sand-gravel depo-sits under plain 39.5 m. Shuangqiao, Beijing in 1980. Its geological age is Late Pleistocene. The bone bed was dated to 29040±600 yr B. P. by radiocarbon.
Length of the chopped trace is 50.3 mm, width 6-8 mm, depth 3mm (Fig 1). Features of the chopped trace show that it is to be chopped with stone tool.

Key words: Late paleolithic age; Trace of human modification