NOVELTY - A downdraft-type pyro-gasification reactor comprises greater than or equal to 1 1st inlet through which predetermined amount of biomass is introduced, storage tank into which to-be-pyrolyzed-and-gasified biomass is introduced, greater than or equal to 1 2nd inlet (34) through which fluidizing agent is introduced into reactor via a fluidizing agent introducing plant, core (4) where pyrolysis and gasification processes take place and is arranged under storage tank and equipped with greater than or equal to 1 1st reaction chamber (41) and greater than or equal to 1 1st grate for supporting the biomass during pyro-gasification process, and cooling structure.    USE - A downdraft-type pyro-gasification reactor for producing synthesis gases from biomass.    ADVANTAGE - High-quality synthesis gas is obtained without long carbon molecules (tar), and manufacturing and maintenance costs are reduced.    DETAILED DESCRIPTION - A downdraft-type pyro-gasification reactor comprises greater than or equal to 1 1st inlet through which predetermined amount of biomass is introduced, storage tank into which to-be-pyrolyzed-and-gasified biomass is introduced, greater than or equal to 1 2nd inlet (34) through which fluidizing agent is introduced into reactor via a fluidizing agent introducing plant, core (4) where pyrolysis and gasification processes take place and is arranged under storage tank and equipped with greater than or equal to 1 1st reaction chamber (41) and greater than or equal to 1 1st grate for supporting the biomass during pyro-gasification process, cooling structure for surrounding and enclosing the core to form hollow space and is fluidly connected to fluidizing agent introducing plant to allow fluid to flow through the hollow space, and 2nd inlet arranged in the core for introducing fluidizing agent from hollow space to the 1st reaction chamber. An INDEPENDENT CLAIM is included for pyro-gasification plant comprising outer casing, lid, ash-pit, plat, and reactor.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the core of the reactor with the cooling structure removed.    Core (4)    2nd inlet (34)    Outer walls (40)    1st reaction chamber (41)    2nd reaction chamber (42)