Provided is a connector capable of facilitating a work of connecting first and second connection targets. A first receiving part to be coupled to a first plug connector and a second receiving part to be coupled to a second plug connector are formed at the housing of a relay connector which electrically connects the first and second plug connectors to be mounted on a chassis. The housing is provided with a contact which establishes conduction between the first plug connector coupled to the first receiving part and the second plug connector coupled to the second receiving part. The housing comprises a housing body having the first and second receiving parts, and a hook provided at the housing body to engage with a hole provided in the chassis.