Abstract: A lamp holder assembly including an upper shell and a bottom shell connected together by a screw joint to hold a lampshade on the outside and a ceramic socket on the inside, an electric wire inserted through the upper shell and connected to the ceramic socket for the transmission of power supply to the ceramic socket, a wire holder mounted in a cylindrical top section of the upper shell and screwed up with a plastic screw cap to hold the electric wire, and two screws respectively threaded into two opposite screw holes on the cylindrical top section of the upper shell and stopped against the electric wire at two opposite sides to hold down the electric wire and to secure a hanger to the upper shell.