There is provided an apparatus for preparing a graphene-structured material. The apparatus includes a supply hopper configured to supply graphite oxide； a supply line of which an end is connected to a lower end of the supply hopper； a reducing atmosphere gas supply unit connected to a side of the supply line； a vertical fluidized bed furnace of which a lower part is connected to another end of the supply line and configured to reduce the supplied graphite oxide with thermal-expansion； a discharge line of which an end is connected to an upper part of the vertical fluidized bed furnace； a vibrating type vertical micro filter connected to an opening portion on a side of the discharge line； a vacuum pump connected to the vertical micro filter； and a collector positioned under the vertical micro filter and connected to another end of the discharge line.
