The interfacial structures of 9750 mPa•s PDMS / mica interface were investigated by FM-AFM with qPlus sensor. The interfaces settled for 25 h and 29 h at room temperature after contacting showed the disordered and the layered density distributions on ∆ƒ, respectively. The approaching and retracting ∆ƒ-z curves obtained on the layered region overlapped, which suggests that the layered structure was stable or metastable. Also, an increase of ∆γ in excess of the hydrodynamic effect was observed near (~1-2 nm) the solid surface, which suggests the intense attraction between the solid surface and the closest liquid molecules.