a flat panel display device with an improved structure reducing the number of components and assembling processes comprises : a panel including a first substrate , an emission unit formed on the first substrate , and a second substrate coupled to the first substrate so as to seal the emission unit and including a flange portion having a first coupling hole ; a monitor frame having a second coupling hole corresponding to the first coupling hole ; and a fastener for coupling the panel and the monitor frame by being inserted into the first coupling hole . in this structure , the flange portion is used to couple the monitor frame to the panel , and thus a separate fixing frame is not used . the lack of need for the fixing frame leads to a fewer number of components and assembling processes .