An plug connector assembly for latching with a mating connector comprises an insulative body defining a latch apparatus on a side thereof, a cable extending along a front-to-back direction and rearwardly exposed to a rear end of the insulative body, and an unlocking assembly assembled on the insulative body and cooperate with the latch apparatus, and the latch apparatus defining a latching portion to latch with the mating connector, wherein the unlocking assembly comprises an actuator assembled on the insulative body and a operating portion connected to he actuator, and when the operating portion is operated, the actuator is derived by the operating portion to apply a force on the latch apparatus, so that the latching portion moves synchronously to release the locking with the mating connector.