A semiconductor memory device includes a plurality of word lines vertically formed on a surface of a semiconductor substrate, where each pair of the plurality of word lines form a set of word lines, a bit line formed parallel to the surface of the semiconductor substrate and disposed in plurality stacked between the word lines of each pair constituting the one set of word lines, and unit memory cells disposed between respective ones of the bit lines and an adjacent one of the pair of word lines of said one of the word line sets.