A nonvolatile memory device having a vertical structure and a method of manufacturing the same, the nonvolatile memory device including a channel region that vertically extends from a substrate; gate electrodes on the substrate, the gate electrodes being disposed along an outer side wall of the channel region and spaced apart from one another; and a channel pad that extends from one side of the channel region to an outside of the channel region, the channel pad covering a top surface of the channel region.