A connector mounted to a circuit board to be inserted into a storage destination, and configured to include: a connector body including a housing part for housing an electric terminal connected to a predetermined wire of the circuit board, and a base part connected to the housing part; a panel including an opening which is formed in a pair of opposed surfaces and through which the housing part can be inserted; an ejector for detaching the circuit board from an insertion destination by turning; and a connection member connected to a turning shaft part for turning the ejector to fasten the circuit board and the base part of the connector body. The connector can be mounted, together with the ejector, to a compact circuit board corresponding to a compact unit wire rack and can be efficiently mounted in a saved space.