Nonvolatile memory device and method of fabricating the same

The non-volatile memory device and a manufacturing method thereof are provided. Non-volatile memory device according to an embodiment of the present invention, the substrate is defined by the element separator having one side wall having an active region projecting perpendicular to the top than the device isolation film; Across the tunnel insulation film and in contact with the one side wall of the active region of the floating gate projecting into the substrate; Between the gate insulating film to be disposed over the floating gate; And a control gate disposed on the inter-gate insulating film.