Abstract: The present invention provides a twist prevention socket and an electrical device having the socket. The socket of the present invention includes a housing and a first plug, which is provided in an insertion part of the housing. The socket further includes a mediating structure, which includes a first connection member, which is connected to the first contact member of the second plug, and a second connection member, which is connected to the second contact member of the second plug and is electrically isolated from the first connection member. The socket further include a locking structure, which includes an elastic compressing member that is provided adjacent to the second plug and the mediating structure to ensure no-load operation of the second plug with respect to the mediating structure and provide a predetermined amount of resistance to removal of the second plug from the mediating structure.