Presently shelling of cashew nuts is done manually, which is riot only labour intensive but also hazardous because of corrosiveness of cashew nut shell liquid. Therefore, a power-operated cashew nut sheller was developed based on the principles of compression and shear. The rated capacity of the sheller was observed to be 18 kg/h of roasted nuts at a shelling efficiency of 70%. The yields in terms of whole, half-splits and brokens were 50%, 22% and 28% respectively.