NOVELTY - A biomass saccharification apparatus comprises 1st decomposition apparatus which decomposes polysaccharide contained in cellulose biomass using pressurized hot water and decomposes lignin contained in cellulose biomass using ammonia, ammonia supply apparatus to supply ammonia to 1st decomposition apparatus, pressurized hot water supply apparatus (2) which supplies pressurized hot water to 1st decomposition apparatus, and recovery apparatus (3) which recovers ammonia and lignin decomposition products from 1st decomposition apparatus.    USE - A biomass saccharification apparatus for ethanol manufacturing apparatus (claimed).    ADVANTAGE - Saccharification of biomass is effectively performed, without degrading solid acid catalyst. Monosaccharide yield is improved.    DETAILED DESCRIPTION - A biomass saccharification apparatus comprises 1st decomposition apparatus which decomposes polysaccharide contained in cellulose biomass using pressurized hot water and decomposes lignin contained in cellulose biomass using ammonia, ammonia supply apparatus to supply ammonia to 1st decomposition apparatus, pressurized hot water supply apparatus (2) which supplies pressurized hot water to 1st decomposition apparatus, recovery apparatus (3) which recovers ammonia and lignin decomposition products from 1st decomposition apparatus, pH control unit to adjust pH of decomposition product of 1st decomposition apparatus from which ammonia and lignin decomposition products are removed to less than or equal to 7, and 2nd decomposition apparatus (5) which decomposes processed material of pH control unit into monosaccharide using solid acid catalyst. INDEPENDENT CLAIMS are included for:    (1) ethanol manufacturing apparatus which comprises biomass saccharification apparatus, alcohol fermentation apparatus which carries out alcohol fermentation of monosaccharide obtained from biomass saccharification apparatus, and distillation apparatus which carries out distillation of process liquid of alcohol fermentation apparatus and isolates ethanol; and    (2) biomass saccharification which involves decomposing polysaccharide contained in cellulose biomass using pressurized hot water and decomposing lignin contained in cellulose biomass using ammonia, separating and recovering ammonia and lignin decomposition products from decomposition products of 1st decomposition process, adjusting pH of decomposition product of 1st decomposition process from which ammonia and lignin decomposition products are removed to less than or equal to 7, and decomposing processed material into monosaccharide using solid acid catalyst.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of ethanol manufacturing plant A. (Drawing includes non-English language text).    Pressurized hot water supply apparatus (2)    Recovery apparatus (3)    2nd decomposition apparatus (5)    Alcohol fermentation apparatus (6)    Distillation apparatus (7)