Electromagnetic interference (EMI) is one of the most detrimental by-product of explosive growth of electronics and telecommunication instrumentation. Electromagnetic radiation has harmful effect, which not only tries to disturb normal operation of appliances but may adversely affect human health [1]. Due excellent polymer composite properties such as lightweight, corrosion resistance, high strength, durability, simple processability, flexibility, cost-effectiveness, they are largely used as EMI shielding materials over metals [2]. Investigating properties of PLA matrix nanocomposites filled with CNT (8, 5, 3, 1, 0,2 vol.%), it has been found that addition of CNT improves electrical conductivity as well as EMI shielding effectiveness. Also, it was found that EMI shielding.