A disvovery recently done in Saint-Denis “ rue du Landy ” (Seine-Saint-Denis, France) in an urban context is presented in this article. At the bottom of a possible lateral pit dated of the Early Neolithic (Villeneuve-saint-Germain Culture), a deposit of ten grinding and pounding complete tools in sandstone and flint has been cleared out. After a description of the morphological and technical characteristics of the lower grinding tools, several interpretations are proposed. The choice of a single type of raw material is linked with homogeneous methods of shaping. The sizes of each tool are also similar. The stages of use and maintenance show evidences of specific types of reuse and resharpening. A technical signification for such deposits is discussed in this paper.