This invention relates to a safety cover used in covering a can cover while the can cover is being opened, the can safety cover having a covering part of a flat plate to cover a surface of the can cover; a protruded receiving part extending axially along a rim of the covering part to receive a protruding rim part which is axially formed along a rim of the can cover; and an opening formed in the covering part to expose a can ring, which is attached on the surface of the can cover, to an outside. The can cover can be operated to be opened while it is covered by the can safety cover. Therefore, during the opening process, injury can be prevented from generating by preventing user's finger from directly contacting a rim of the can cover or a cut line of a main body of the can.