Study of the marine Holocene deposits in southeastern Tunisia shows bioclastic beaches at elevations ranging between 0 and 100 cm above high tide level (a.h.t.1.). Depending on the elevation of these fossilized shorelines, the ages obtained are different. The age of the older deposits ranges between 5900 and 4000 14C yr B.P. (6400-4300 calendar yr B.P.), there deposits consist of bioclastic beaches attaining an elevation of about $40 to + 100 cm a.h.t.1.. The younger deposit is dated at around 2100 14C years ago (1850 calendar yr B.P.), and is found today at the same elevation as the present sea level. This deposit also consists of bioclastic beach material, and contains pottery fragments. Postglacial melting should not be responsible for this observed higher relative sea level stand, because deglaciation ended about 7000-6000 14C years ago . Furthermore, the regularity of the paleobeach deposit elevation over a broad area in southeastern Tunisia suggests that tectonics cannot explain the emergence. The emergence of up to 1 m of marine deposits dating back to between 5900 and 4000 14C yr B.P. should rather be interpreted as the result in the region of a postglacial hydro-isostatic rebound, as predicted in the rheological models of continental margins by, for example, Clark et al. (1978) and. The present situation was reached 2100 14C years ago.