NOVELTY - The method involves filling reaction container (2) with biomass fine granule (11). The reaction process is cooled after heating biomass fine granule. A hopper (3) provided above reaction container is also filled with granule measured in measuring equipment (12). A pressurization piston (6) is dropped inside reaction container and pulled out from reaction container for pressurizing granule. The residual amount of granule in hopper is measured when pressurization piston is pulled up. The filling process of granule is completed if granule does not remain in hopper.    USE - Method for manufacturing bio-coke used as fuel in iron manufacturing industry, casting production and combustion installation such as electric power generation.    ADVANTAGE - The operations of the filling and pressurizing the biomass fine granule in the reaction container are performed easily. The residual amount of the granule in the hopper is detected easily, so that the input time of the granule in the reaction container is reduced and the efficiency of insertion operation of granule is improved. The size reduction of the installation and time reduction of the process reduces the cost. Hence the bio-coke is manufactured efficiently.    DETAILED DESCRIPTION - The biomass is heated in temperature range to obtain solid substance before half carbonization. The molded object produced from the reaction container is cooled. The pressure of the pressurization piston is reduced after the reaction process. The bottom face cover portion (9) of the reaction container is opened for discharging the cooled molded object. The pressurization piston is contacted with pressurization cylinder through a rod. A rod cleaning element (13) is provided to slidably contact to the outer peripheral surface of the rod for removing granule adhered to the rod. An INDEPENDENT CLAIM is included for bio-coke manufacturing apparatus.    DESCRIPTION OF DRAWING(S) - The drawings show the schematic views of the bio-coke manufacturing apparatus.    Reaction container (2)    Hopper (3)    Pressurization piston (6)    Bottom face cover portion (9)    Biomass fine granule (11)    Measuring equipment (12)    Rod cleaning element (13)