A flat panel display apparatus is disclosed which includes first and second insulating plates at least one of which is transparent, a first plurality of parallel electrodes mounted on one surface of the first plate, a second plurality of parallel electrodes mounted on one surface of the second plate to intersect at a predetermined angle to the first electrodes, the first electrodes being spaced with and opposed to the second electrodes to define a cross conductor matrix for locating glowing regions, and a plurality of parallel insulating barriers mounted on at least one surface of the first plate so as to extend in parallel with the first electrodes and project toward the second plate, the barriers having the same pattern, pitch and width as that of the first electrodes, and each of the barriers overlapping the respective one side edge portion of one of the first electrodes, and the first and second plates being joined together with their outer edges sealed and gas capable of glowing mounted between the plates.