摘要:Tam Hang rock shelter was excavated in 1934 by the French geologist Jacques Fromaget who discovered 13 skeletons and a lot of stone tools. But after the second War World, the lithic assemblages were lost. Then the site was forgotten since 2003, when the department of archaeology of the Lao Ministry of Culture relocated it and made with a French team a new prospection. In 2007 and after seven campaigns of excavations, a lot of archaeological materials had been found in two new areas opened at Tam Hang South and Tam Hang Central. More than 9000 specimens of stone have been found. This article proposes to give a new approach of the whole stratigraphy with C14 dating. It also makes a characterization of the lithic assemblage which belongs to the Hoabinhian techno-complex.