A nonvolatile memory device includes a pipe gate electrode layer formed over a substrate; a plurality of conductive layers stacked over the pipe gate electrode layer; source lines formed over an uppermost one of the conductive layers; first slits passing through the pipe gate electrode layer at positions overlapping with the source lines, and dividing the pipe gate electrode layer into a plurality of pipe gate electrodes, and second slits passing through the conductive layers at positions different from the first slits, and dividing the conductive layers into a plurality of memory blocks.