The present invention provides an emissive flat panel display device which is capable of performing a gate operation at a relatively low voltage of several V to several tens V using gate electrodes. In the emissive flat panel display device which includes a back panel which is constituted of a back substrate on which cathode electrodes having electron sources formed of carbon nanotubes and gate electrodes are formed, a face panel which forms phosphors and anode electrodes thereon, and a sealing frame which seals the back panel and the face panel, the difference between an electric field strength Emax for allowing the electron sources to obtain the required maximum emission current density and an electric field strength Emin which becomes the minimum emission current density is set to 1V/μm or less, and preferably 0.5V/μm or less.