A biomass supply unit 12 that supplies the biomass material 11 having cellulose, hemicellulose, and lignin from normal pressure to pressure, and the biomass material 11 is hydrothermally decomposed with pressurized hot water (hereinafter also referred to as “hot water”) 15, Hydrothermal decomposition unit 17 for dissolving lignin component and hemicellulose component in pressurized hot water 15, biomass solid content extraction unit 18 for extracting biomass solid content 20 from hydrothermal decomposition unit 17, and biomass solid content extraction While communicating with the outlet 18, the extracted biomass solids 20 is charged, an enzyme liquefaction tank 21 that supplies the biomass 30 to the biomass solids 20 to liquefy the biomass solids 20, and the liquefied biomass solids And a discharge portion 23 for discharging 24 from the pressure to the normal pressure.
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