Biomass briquette is made from many types of biomass materials such as rice husk and bagasse which is partially the city waste; however, they are potential energy sources and widely available in Cambodia. Rice husk and bagasse are becoming one of the useful energy sources to help reducing organic waste in the city once being converted into a ready-to-use form. In addition, to form the rice husk and bagasse to be in briquette shape, binding material had mostly required in the briquetting process; thus, fish oil and a new binder, had selected in this study. Therefore, the first aim of this study was to carry out the mixing ratio between rice husk and bagasse of 100:0, 75:25, 50:50, 25:75, 0:100 by adding fish oil at 10% of 4 kg of the total mass. The briquette samples were obtained using a screw press machine. The second aim was to evaluate the possible usage of the briquette by examining properties including density values, impact resistance, water resistance, heating value, burning rate, energy density, moisture content, volatile matter, ash content, and fixed carbon. The experimental result showed the density value at 0.921-1.252 kg/m3, energy density at 18.69-22.69 GJ/m3, heating value at 17.98-20.38 MJ/kg w/w, moisture content at 3.78-4.7% w/w, volatile matter at 70.8-81.54%, ash content at 10.32-13.66%, fixed carbon at 8.14-15.55%, and the burning rate of 4.74-6.4 g/min. The maximum heating value and energy density were 19.61 MJ/kg w/w and 21.83 GJ/m3 respectively, while the minimum burning rate was 4.74 g/min and moisture content at 3.78% w/w in briquette 50:50. The impact resistance of briquettes was accepted as they remained in good shapes after encountering force or collision during the empty of the densified products from trucks onto the ground or from chutes into the bins. However, the water resistance of the briquette at the rate of 100:0, 75:25, 50:50, and 25:75 was failed under the rain or high humidity condition during the transportation and storage. Briquette at 0:100 was found to be more suitable for commercial applications in terms of cost- effectiveness.