Abstract: A dust filtering apparatus for a computer system comprising computer housing and a dust filtering apparatus, wherein the computer housing is used to accommodate the computer components of the computer system. The computer housing has a panel. The dust filtering apparatus has an area approximate to the area of that panel. The dust filtering apparatus comprises a first dust filtering member and a second dust filtering member. The first dust filtering member and the second dust filtering member of the dust filtering apparatus are bonded together. The dust filtering apparatus is magnetically attached to the panel of the computer housing and thereby forms a seamless protection to prevent computer components from being contamination by dust particles.