Abstract: Disclosed is a nano membrane which has improved dustproofness and thus effectively prevents matter, contaminants/dust, and the like from getting into an electronic device such as a PCB or a MEMS microphone, and has no air and sound permeability degradation. The nano membrane of the present disclosure contains a plurality of pores having an average diameter of 0.5-20 ?m, wherein the maximum diameter of each of the pores is 30 ?m, the minimum diameter of each of the pores is 0.1 ?m, and the porosity of the nano membrane is 50-90%.