Disclosed in the present specification is a dust-proof composition comprising, a negatively charged material as an active ingredient. Particularly, a polymer or an inorganic material contained, as the active ingredient, in the dust-proof composition have similar zeta potential to dust such that the dust attached to the skin by electrostatic force can be minimized, and the dust can be readily removed from the skin even if the dust is temporarily attached to the skin. Specifically, the fine dust is prevented from penetrating the skin so as to minimize skin inflammation and the accumulation of heavy metals, and thus the dust-proof composition is beneficial for the skin health.