NOVELTY - A manufacturing apparatus of liquid sugar comprises 1st solid-liquid separation part (310) which separates solid-liquid mixture (M1) obtained by reacting polysaccharide derived from lignocellulosic biomass and catalyst into liquid sugar and liquid sugar-containing residue (S2), extraction part (320) which generates solid-liquid mixture (SL2) of liquid sugar-containing liquid (LA) and solid residue (S3) by extracting liquid sugar (L1) contained in liquid sugar-containing residue by liquid (EL) of organic solvent, and 2nd solid-liquid separation part (322).    USE - A manufacturing apparatus of liquid sugar for manufacture of ethanol (claimed).    ADVANTAGE - Liquid sugar remaining in solid residue can be efficiently recovered by a simple structure, and yield of liquid sugar can be improved.    DETAILED DESCRIPTION - A manufacturing apparatus of liquid sugar comprises 1st solid-liquid separation part (310) which separates solid-liquid mixture (M1) obtained by reacting polysaccharide derived from lignocellulosic biomass and catalyst into liquid sugar and liquid sugar-containing residue (S2) in which liquid of organic solvent with boiling point of less than or equal to 100 degrees C and separated liquid sugar-containing residue are contacted at normal temperature and normal pressure, extraction part (320) which generates solid-liquid mixture (SL2) of liquid sugar-containing liquid (LA) and solid residue (S3) by extracting liquid sugar (L1) contained in liquid sugar-containing residue by liquid (EL) of organic solvent, and 2nd solid-liquid separation part (322) which separates solid-liquid mixture into sugar liquid-containing liquid and solid residue. The apparatus hydrolyzes polysaccharide derived from lignocellulosic biomass and manufactures liquid sugar using catalyst. INDEPENDENT CLAIMS are included for:    (1) manufacture of liquid sugar; and    (2) manufacture of ethanol which involves hydrolyzing polysaccharide derived from lignocellulosic biomass, manufacturing liquid sugar using catalyst, fermenting liquid sugar, and producing ethanol.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the recovery part of the liquid sugar manufacturing apparatus. (Drawing includes non-English language text).    1st solid-liquid separation part (310)    Extraction part (320)    2nd solid-liquid separation part (322)    Liquid (EL)    Liquid sugar (L1)    Liquid sugar-containing liquid (LA)    Solid-liquid mixture (M1)    Liquid sugar-containing residue (S2)    Solid-liquid mixture of liquid sugar-containing liquid and solid residue (SL2)    Solid residue (S3)