The project is aimed to dry rubber sheets as there is no device or strategy to dry rubber sheets currently available. The use of open sun drying of rubber sheets depends on climatic conditions. To overcome the practical difficulties of the conventional method, a solar tunnel greenhouse dryer coupled with a biomass backup heater was designed and developed. This dryer was basically on the principle of the greenhouse effect in which all the radiation emitted by the sun will be absorbed by the dryer. The biomass backup heater can be used as a backup to provide heat during the nighttime and on rainy days.