Biocoal made by mixing Sub-Bituminous Tanjung Enim coal with rice skin biomass to make biocoal briquette that will have calorific value suitable for domestic consumption and also have a quicker initial burning time that has been a problem in applying briquette. The rice skin biomass was mixed in 10 gram – 50 gram compositions with 1 gram – 5 gram variations of wax to a fixed weight of 100 gram coal. The size of coal was also studied, which was 50 mesh, 70 mesh, 140 mesh and 220 mesh. The result shown that all briquettes had calorific values (5014 – 5891 cal/gram) that are in range of biocoal standard (5500 – 6000cal/gram)with a quicker initial burning time (2:35 – 16:58 minutes). The sulphur content was reduced because of biomass added (0,21% – 0,31%; standard 60 kgF/cm2). The inherent moisture (%IM) was in range 3,69% – 7,46% (standar
