An electronic device includes a semiconductor memory unit. The semiconductor memory unit includes a plurality of first lines extending in a first direction, a plurality of second lines extending in a second direction crossing the first direction, and a plurality of memory cells provided between the first lines and the second lines at intersections of the first lines and the second lines. Each of the memory cells includes a variable resistance element coupled to and disposed between a corresponding second line and first and second selection elements, the first selection element coupled to and disposed between the variable resistance element and a corresponding first line, and the second selection element coupled to and disposed between the variable resistance element and the corresponding first line. The first selection element allows a bidirectional current flow therethrough, and the second selection element allows a unidirectional current flow therethrough.