A plasma display device such that fluctuation of discharge start voltage and lowering of luminance would not easily occur, the burning phenomenon of the screen is suppressed, and excellent reliability and long life can be secured, and a method of producing the same, are disclosed. The plasma display device comprises a first panel (10) provided with discharge sustaining electrodes (12) and a dielectric layer (14) on the inside thereof, and a second panel (20) laminated on the first panel (10) so that discharge spaces (4) are formed on the inside of the first panel (10), and the trap density and/or the movable metallic ion density in the dielectric layer (14) is not more than 110¹⁸ pieces/cm³, preferably not more than 110¹⁷ pieces/cm³.