The utility model provides a socket comprising a shell of which the internal part is hollow and the bottom part is open. The opening of the bottom part of the shell is provided with a bottom plate which is provided with three through holes which are arranged in a triangular shape. The three through holes are rotatably provided with a jack assembly respectively. The jack assembly comprises a cylinder body which is arranged in the shell, and one end of the cylinder body is rotatably inserted in the through holes. The peripheral wall of the cylinder body is provided with stop blocks preventing the cylinder body from loosing out of the through holes. The internal part of the cylinder body is provided with an accommodating cavity which is arranged in the opening of the bottom part of the cylinder body, and the top part of the cylinder body is provided with a jack which is communicated with the accommodating cavity. A U-shaped conductive metal board is clamped in the accommodating cavity. A spring, which elastically abuts the cylinder body and enables the stop blocks on the cylinder body to be abutted against the internal wall of the shell, is arranged between the cylinder body and the bottom plate. According to the socket, the socket can be connected with various types of plugs so that inconvenience in normal electricity utilization caused by mismatching of a jack arrangement mode can be avoided.