NOVELTY - A gas for partial combustion such as oxygen (5) and biomass (1) are reacted. The resulting biomass is partially combusted and is made to react with a gas for gasification such as water vapor (4). Subsequently, the gasification of the biomass is carried out.    USE - For gasification of biomass for manufacturing methanol (claimed).    ADVANTAGE - The gasification is performed in a short duration of time since the temperature reduction in partial combustion of biomass is suppressed. The partial combustion of biomass is carried out uniformly and the concentration of hydrogen gas in the formed gas is increased. An increased amount of hydrogen gas is produced in a reduced sized apparatus. The biomass is utilized effectively and partial combustion of biomass is performed reliably. Excessive heating in the ignition combustion zone is suppressed, hence rapid degradation of biomass is prevented. Methanol is produced with efficiently and economically even in a compact gasifier.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) A gasifier (14) which has a biomass supply unit for supplying biomass, a gas supply unit (I) for supplying gas for partial combustion such as oxygen, a gas supply unit (II) for supplying gas for gasification such as water vapor, an ignition combustion zone (14a), and a gasification region (14b) in which the biomass and gas for gasification are made to react. The biomass and the gas for partial combustion are made to react in the ignition combustion zone and partial combustion of the biomass is performed in the ignition combustion zone;    (2) Manufacture of methanol which involves producing methanol using the gas obtained by the gasification method; and    (3) Method manufacturing apparatus which has an unit for synthesizing methanol.    DESCRIPTION OF DRAWING(S) - The figure shows the outline block diagram of the gasifier. (Drawing includes non-English language text).    Biomass (1)    Water vapor (4)    Oxygen (5)    Gasifier (14)    Ignition combustion zone (14a)    Gasification region (14b)