Abstract: A connector for a coaxial cable includes a fastening sleeve received in a tubular end piece and the cable extends through the fastening sleeve. The fastening sleeve includes a tapered inner periphery. A threaded piece is threadedly connected to the end piece and includes a tapered inner periphery which presses a thinner portion at the tapered inner periphery of the fastening sleeve so as to apply an inward force to the fastening sleeve to secure the cable without using any special tool. A tube securely extends through the threaded piece and the core of the cable extends through the tube. A connection collar is rotatably mounted to the tube and has a connection threaded portion which is used to connect with a jack of an electric appliance.