A socket cover contains: a cap, a first lid, and a second lid. The cap has an orifice defined thereon, the first lid is disposed on a first side of the orifice of the cap and covers a first part of the orifice, and the first lid has a cutout defined on a non-closed position thereof opposite to the orifice of the cap. The second lid is disposed on a second side of the orifice of the cap and covers a second part of the orifice which is not covered by the first lid, and the second lid has a projection corresponding to the cutout of the first lid. Thereby, when a plug is inserted in a socket, the cap is positioned stably to enhance using safety and aesthetics appearance.