An electron emitting device includes a substrate, a plurality of first wiring units, each of the plurality of first wiring units including a plurality of first electrodes extending in a first direction on the substrate and spaced apart from each other, a plurality of second wiring units, each of the plurality of second wiring units including a plurality of second electrodes each extending in a direction substantially opposite to the first direction and interposed between adjacent first electrodes of the plurality of first electrodes, and a plurality of first electron emitters at sides of the first electrodes and a plurality of second electron emitters at sides of the second electrodes, wherein at least one of the plurality of first wiring units or the plurality of second wiring units is configured to be driven separately.