Provided is an adapter adapted for a specific single board computer. The adapter is readily usable without taking time and effort to wire and arrange accessories. The adapter includes an adapter body adapted to a specific single board computer selected from a plurality of different single board computers. The adapter body is detachably mountable, in a configuration being fitted with the specific single board computer, on a docking station mounted with one or more accessories. The adapter further includes: one or more receptacle connector components mounted on the adapter body, and being attachable to the main connector components; one or more connector components mounted on the adapter body, and being attachable to receptacle connector components electrically connected to the accessories of the docking station; and one or more wires arranged in the adapter body and electrically connecting the receptacle connector components respectively to the connector components.