A receptacle connector includes a receiving slot, a mating plate slidably received in the receiving slot, an ejection mechanism, and a resetting mechanism. The mating plate is exposed at a front end of the receiving slot and is provided with a urging portion and a first engaging portion. The ejection mechanism is provided with a stopping portion for correspondingly stopping the urging portion, so that the ejection mechanism can drive the mating plate to slide outwards. The resetting mechanism is provided with a second engaging portion for being correspondingly engaged with the first engaging portion, so that the resetting mechanism can drive the mating plate to return to an original position.