Abstract: A spacer using a cross structure, which is used to maintain the interval between two panels, for large flat panel display devices, and a flat panel display device using the spacer, are provided. This spacer includes a cross-rib type spacer obtained by combining a cross structure and a rib structure, and a cross-trapezoid type spacer obtained by combining a cross structure and a trapezoid rib structure. These spacer structures facilitate enlargement of panels by increasing the supporting strength while maintaining a high aspect ratio. Also, while these types of spacers are incorporated with a metal mesh, the distance between the mesh and a substrate is freely controlled according to the length of a cross structure, thereby improving the focusing of emitted electrons.