Abstract: A connector includes an outer shell with opposite connecting end and rear end in an insertion direction, the connecting end being located at a front end of the outer shell, a receiving space being defined in the outer shell, an opening being defined in the connecting end; a first terminal fixed in the receiving space; a fastener being connected to and rotatable relative the outer shell about a rotary axis, the fastener including a locking portion and a button, the locking portion being set in the outer shell and extending towards the opening, the button including a pressing portion capable of being operated from outside, the pressing portion being set at a front end of the rotary axis, and the locking portion being set at a front end of the pressing portion; and an elastic member being connected to the fastener and generating an elastic force on the fastener.