There is provided a receptacle unit including a plurality of receptacle connectors and mounted on an electronic apparatus, at least two guide reception portions which, when docking with a plug unit including a plurality of plug connectors, before at least one of the plurality of receptacle connectors engages with at least one of the plurality of plug connectors, receiving a guide portion of the plug unit, and a coupling portion which couples the at least two guide reception portions, at least one receptacle connector of the plurality of receptacle connectors which is mounted on a board independently of at least one other of the receptacle connectors, and the at least two guide reception portions and the coupling portion which are fixed to the board after the plurality of receptacle connectors are mounted on the board.