Related to is the technical field of connectors and disclosed are a connector and a connector assembly. The connector includes a connector body, a heatsink and a light guide, where the connector body is provided with a limit member, the heatsink is disposed on an upper surface of the connector body and is provided with multiple heatsink clips spaced apart from each other and arranged side by side, the light guide is disposed on the connector body, and the limit member is configured to support the light guide. The connector assembly includes the connector described above and a docking connector plug-in fitted with the connector.