NOVELTY - A reaction container is filled (S4) with fine granules of biomass. The granules are pressure-heated (S8) to obtain a solid substance, which is cooled to obtain bio-coke. The container is filled with fine granules of biomass (I) and fine granules of biomass (II) having higher glucide content than biomass (I). While pressurizing (S5), after heating (S9), the substance is cooled (S10) and bio-coke is discharged (S14). When completion of discharge is detected, the heater is operated, the mixture is filled, and the reaction container is heated.    USE - Manufacture of bio-coke. Uses include but are not limited to alternative fuel of coal coke, heat source, and reducing agent used in cupola furnace and blast furnace in iron manufacturing and casting production industries, and boiler fuel used in electric-power generation.    ADVANTAGE - The method enables efficient and quick manufacture of highly rigid and high-density bio-coke. The biomass mixture has improved reactivity. The apparatus used is compact. The compression-molded bio-coke molded product is discharged easily and reliably.    DETAILED DESCRIPTION - A bottomed cylindrical reaction container is filled with fine granules of biomass. The granules are pressure-heated at a temperature and pressure to obtain a solid substance before semi-carbonization in a dense state. The solid substance is cooled to obtain bio-coke. The reaction container is filled with a mixture of fine granules of biomass (I) and fine granules of biomass (II) having higher glucide content than biomass (I). While pressurizing the mixture with pressurizing component inserted from the upper portion of reaction container, after heating by a heater and heat-retaining, the heater is switched to a cooler for cooling. After cooling, the bio-coke molded product produced in the reaction container is discharged. When completion of discharge is detected, the heater is operated, the mixture is filled, and the reaction container is heated. An INDEPENDENT CLAIM is included for bio-coke manufacturing apparatus consisting of a reaction container, a pressurization component, a heater, a cooler, and a controller for controlling pressure of pressurization component and switching control of the heater and cooler. When the controller controls the pressure of biomass at a pressure lower than that during filling process, the heater is operated at the pressure of pressurization component, and the heater is switched to the cooler after preset time.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of the bio-coke manufacturing method. (Drawing includes non-English language text)    Filling of biomass in reaction container (S4)    Pressurizing process (S5)    Pressure-heating process (S8)    Heating process (S9)    Cooling process (S10)    Discharge of bio-coke (S14)