NOVELTY - The method involves preparing the particulate form biomass in a water-containing state. The lignocellulosic biomass and cellulase are introduced inside the reaction tank (2) from one end side of the reaction tank extending in a horizontal direction. The biomass and cellulase are vertically moved towards other end of the reaction tank. The biomass and the cellulase are stirred by rotating the stirring apparatus (7). The longitudinal axis of the reaction tank is used as a central axis.    USE - Saccharification method of biomass e.g. vegetable waste material such as wood, timber, coppiced timber, used tea leaves, coffee husk, bark and herbs, rice straw, pulp, discard paper, cotton fabric, hemp cloth, and crushed material of algae used to produce sugar and ethanol. Can also be used in producing butanol, acetone, ketone, hydroxymethyl furfural, furfural and other alchohols.    ADVANTAGE - The sugar and ethanol can be produced easily and efficiently ay low cost. The amount of enzyme and time required for producing ethanol by performing saccharification enzyme reaction and fermentation processes using vegetable waste as the starting material can be reduced. The amount of water required for performing the enzymatic decomposition process of the cellulose can be reduced. The used enzymes can be reused effectively. The production cost of ethanol can be reduced. The energy required for purifying final ethanol can be reduced. The economical efficiency of the ethanol producing apparatus can be reduced. The waste materials can be processed efficiently. The vegetable matter waste material can be effectively used as biomass. The utilization rate of energy resources can be reduced.    DETAILED DESCRIPTION - The inclination angle of the reaction tank is set as 3 degrees , such that one end side of the reaction tank is lower than the other end side of reaction tank. The hemi-cellulose contained in the biomass is removed by performing hydrolysis process. The mass amount of water contained in biomass is 80-90%. INDEPENDENT CLAIMS are included for the following:    (1) The manufacturing method of sugar, involves producing saccharified liquid by the hydrolysis of cellulose contained in biomass. The saccharified liquid and solid residues are respectively collected from the other end side of the reaction tank. The collected slid residue is re-introduced from one end side of the reaction tank. The cellulase contained in solid residue is reused. The saccharification rate of the saccharified liquid is 50-90%;    (2) the manufacturing method of ethanol, involves performing microbial fermentation of the sugar so as to produce ethanol;    (3) the biomass saccharification apparatus has a reaction tank which is extended in horizontal direction. The biomass supply unit is adapted to supply the particulate form biomass to the inside of reaction tank and to move the biomass to other end side of reaction tank. The enzyme addition unit is used for adding the cellulase with biomass. The stirring apparatus is rotated, so as to stir the biomass and cellulase. The emission unit is adapted to collect the saccharified liquid from other end side of reaction tank. The paddle (9) is standingly arranged along the emission direction of liquid. The rotating shaft (8) is pivotally supported in the reaction tank. The replenishment unit is used for replenishing the biomass in the inside of reaction tank. The pressurized hot water apparatus is adapted to hydrolyze and to remove the hemicellulose contained in biomass;    (4) the sugar manufacturing apparatus (1) has recirculation unit which is adapted to collect saccharified liquid and solid residues from the other end side of reaction tank and to recycle the amalyse contained in the solid residue. The secondary saccharification apparatus is adapted to hydrolyze the amalyse contained in the liquid discharged from tank; and    (5) the ethanol manufacturing apparatus has a fermentation unit which is adapted to perform the microbial fermentation of the sugar, so as to produce ethanol. The distillation unit is adapted to purify the produced ethanol.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the sugar manufacturing apparatus.    Sugar manufacturing apparatus (1)    Reaction tank (2)    Stirring apparatus (7)    Rotating shaft (8)    Paddle (9)