To manufacture molded fuels having various shapes and sizes, which are obtained without dry distillation of a biomass at a predetermined temperature and without addition of a binder and which have high mechanical strengths and good storage properties.

First, an aqueous solution or suspension 13 of slaked lime is stuck to a biomass raw material 12 consisting of biomass powders or a biomass pulverent. Next, into the biomass raw material 12 attached with this aqueous solution or suspension 13 of the slaked lime a coal raw material 14 having a particle size of 3 mm is added in a proportion of 100% by mass per 100% by mass of the biomass raw material and heated at a temperature of 80-100C. Further, the heated mixture 16 is applied with a pressure of 100-500 MPa under a temperature of 80-100C using a double roll type press 17 to heat and mold into a briquette or plate.