The purpose of the invention is to improve the mass productivity of display devices by using a glass substrate that prevents the degradation of an electrode caused by glass of the display device. The present invention provides a flat panel display device containing at least two substrates and a light emitting part provided between the two substrates, wherein at least one substrate of the two substrates contains SiO2 as a main component and contains 1% to 10% by weight of at least one type selected from the group consisting of La, Y, Gd, Yb, and Lu in terms of oxides, 5% to 25% by weight of R2O (R denotes one or more types selected from a group consisting of Li, K, Cs, and Rb), and 8% to 20% by weight of Al2O3, and wherein the surface electric resistance at 350° C. of the glass material is higher than 1×108 (Ω/square).