Drying of agricultural products using coconut shell waste as biomass has been done. Drying chamber in the rectangular formed of the size 130 cm x 97 cm x 120 cm that is equipped by a cylinder that has diameter of 50 cm, heigh of 30 cm, and 0,7 mm. The sample used are cassava crackers that is produced by Rejosari village Tenayan Raya subdistrict Pekanbaru. The temperature measurement by using th…