NOVELTY - Preparing saccharified liquid, by (a) mixing saccharogenic amylase and cellulose biomass, performing saccharification reaction of the biomass, and separating solid and liquid portion of the obtained product to obtain saccharified liquid and residue, (b) adding water to the obtained residue, and performing saccharification reaction using the obtained residue using saccharogenic amylase which absorbs the residue, and (c) adding cellulose biomass to the saccharified liquid, and performing saccharification reaction using saccharogenic amylase in the saccharified liquid.    USE - The method and apparatus are useful for preparing saccharified liquid (claimed) which used as petroleum raw material.    ADVANTAGE - The method is inexpensive.    DETAILED DESCRIPTION - Preparing saccharified liquid, involves (a) mixing saccharogenic amylase and cellulose biomass in aqueous solution, performing saccharification reaction of the biomass using saccharogenic amylase, and separating solid and liquid portion of the obtained product to obtain saccharified liquid and residue, (b) adding water to the obtained residue, preparing aqueous solution, and performing saccharification reaction using the obtained residue with saccharogenic amylase which absorbs the residue, and (c) adding cellulose biomass to the saccharified liquid, and performing saccharification reaction of the obtain biomass using saccharogenic amylase in the saccharified liquid. An INDEPENDENT CLAIM is included for saccharification reaction apparatus for manufacturing the saccharified liquid, which comprises (d) three reaction tanks for mixing saccharogenic amylase and cellulose biomass in aqueous solution, and performing saccharification reaction of the biomass with saccharogenic amylase, (e) biomass supply portion for supplying biomass to each of the reaction tanks, (f) enzyme supply portion for supplying saccharogenic amylase to the first reaction tank, (g) water supply portion for supplying water in to second reaction tank, (h) separating portion for separating the reaction liquid obtained by reacting biomass and saccharogenic amylase to produce into solid and liquid to first reaction tank, (i) conveyance portion for adding saccharified liquid separated in the first separation portion, and (j) control portion which produces signal output, where the second reaction process and the third reaction process is performed in the second reaction tank, and the saccharification reaction is performed in third reaction tank.