Disclosed is an electronic device which includes a housing having a protective layer formed thereon. The electronic device according to embodiments of the present invention may include a housing which covers at least a part of the outer surface. The housing includes a transparent substrate, a multilayer structure formed on the surface of the transparent substrate and including multiple layers which are stacked such that the respective adjacent layers have different refractive indexes and an aluminum oxide layer formed on the multilayer structure. The transparent substrate may include a glass material.