A connector assembly comprises a male connector and a female connector. The male connector includes a cap housing, an access terminal accommodated in the cap housing, a connecting part fixably mounted in the cap housing, and a protection part configured to be movable relative to the connecting part in a lengthwise direction of the access terminal. The female connector includes a plug housing configured to insert in the cap housing. The plug housing is configured to release a fastening state between the connecting part and the protection part and to push the protection part toward a floor surface of the connecting part during coupling of the male connector and the female connector.