The present invention is a biomass compactor. The device is made up of a frame having a hydraulic compaction cylinder. When the hydraulic control is activated, the compaction cylinder moves forward through a hopper filled with various biomass materials, such as but not limited to, yard waste and food waste products. The compaction cylinder pushes the raw biomass material into the compaction area, thereby compressing the biomass material. When the compaction cylinder is retracted, the hopper can then be refilled and the compaction process repeated as desired up until the point where the compression area is full. The resulting compressed biomass material is removed and can be used as fuel, such as by burning the resulting compressed biomass material in a fireplace or wood burning stove.