Electric connector and connector assembly

The invention discloses an electric connector which is used for plugging a butting connector, and the electric connector comprises an insulating body which is provided with a receiving cavity which is recessed backwards in the front-back direction, and the receiving cavity penetrates through the insulating body upwards in the up-down direction; the plurality of conductive terminals are fixed on the insulating body, and each conductive terminal is provided with a contact part exposed in the receiving cavity; the grounding piece is arranged on the insulating body, and the grounding piece is provided with a first pivoting part; the gland is provided with a second pivoting part and a buckling part, the second pivoting part is contained in the receiving cavity, the second pivoting part is located behind the contact part, the second pivoting part is pivoted with the first pivoting part to enable the gland to rotate relative to the insulating body, and the buckling part is buckled on the insulating body in front of