Connector and connector assembly

The invention discloses a connector and a connector assembly. The connector includes: a housing; the buckling piece is movably mounted in the shell; and an elastic retaining element fixed in the housing. In the process of matching with the matching connector, the buckling piece firstly moves forwards from an initial position to an end position under the pushing of a plug of the matching connector, and then moves backwards from the end position to a holding position jointed with the elastic holding element under the action of the elastic force of the buckling piece; the fastener is held by the elastic holding element in a state of being engaged with the plug; in the process of separating the connector from the mating connector, the buckling piece firstly moves forwards from the holding position to the release position where the buckling piece is not connected with the elastic holding element under the pushing of the plug, and then moves from the release position to the initial position where the buckling piece