An experimental convection drying cassava forced study was conducted using a solar dryer with forced convection, an oven and a precision balance. This study identified the cassava drying kinetics at different racks of drying. These kinetics were obtained by comparing first on each rack and between racks. Threads rotate about the influence of the distribution of the products on the trays, then the position of the trays and finally to the hot air supply of the drying cubicle. The conclusions obtained require us to take account of these findings in the design of indirect solar dryer.