Le Dung Trang Title: Topology of hypersurfaces with non-isolated singularities Abstract: First, we shall give a quick description of Milnor results of isolated singularities of hypersurface. Then, we shall show how one studies the case of non-isolated singularities. We shall define relative polar curves, Whitney stratifications, Thom A_f condition. We shall indicate the technical difficulties that one meets in this study.