In this paper, the lower calorific value of corn cobs, palm kernel shells and tender coconut husks were determined and were respectively 24 760 J/g for corn cobs; 25 096 J/g for palm kernel shells and 16 550 J/g for tender coconut husks. Then, the mixture of different amount of corn cobs and palm kernel shells were made. The determination of their lower calorific value has shown that the mixture of 40% of corn cobs and 60% of palm kernel shells in mass has increased, 25 667 J/g, compared to the initial biochars.These values are lower compared to charcoal one's, 29 061 J/g.To bind the mixture as fuel briquettes, addition of 13.04% in sample total mass of clay is made. Binder decreases samples lower calorific value as 20 842 J/g for corn cobs, 13 527 J/g for tender coconuts husks and 21 377 J/g for palm kernel shells.For the mixture of 50% of corn cobs and 50% of palm kernel shells, lower calorific value decreases less compared to others.