Abstract: A freely rotational receptacle includes an upper casing member with a hollow space, a receptacle body, a terminal set, a first contact ring, a second contact ring, a relay seat and a lower casing member. When the freely rotational receptacle is assembled, the receptacle body, the terminal set, the first contact ring, the second contact ring, the relay seat and the upper casing member are capable of being assembled to the lower casing member to allow the receptacle body rotating freely in a space formed by the upper and lower casing member for performing power supply.