A board connector assembly comprising: a circuit board; a connector body, housing and holding a terminal fitting connected to a cable extended from an external apparatus and corresponding to a contact pattern arranged on the circuit board; and a connector receiving member, attached to the circuit board, and to which the connector body is fitted, and which engagingly locks a tip end surface of the connector body in a state where the tip end surface (41 a) of the connector body is butted against a surface of the circuit board, the connector body further including: an outer housing, an inner housing, fitted to the outer housing so as to be slidable in the outer housing along a fitting direction along which the connector body and the connector receiving member are fitted to each other, and housing the terminal fitting so that a tip portion is projected from the tip end surface (41 a) of the connector body, and a housing urging spring, disposed between the inner housing and the outer housing in a compressed state urging the inner housing in the fitting direction along which the connector body and the connector receiving member are fitted to each other, and a contact portion of the terminal fitting pressingly contacting with the contact pattern, thereby causing the terminal fitting to be electrically connected to the contact pattern. a circuit board; a connector body, housing and holding a terminal fitting connected to a cable extended from an external apparatus and corresponding to a contact pattern arranged on the circuit board; and a connector receiving member, attached to the circuit board, and to which the connector body is fitted, and which engagingly locks a tip end surface of the connector body in a state where the tip end surface (41 a) of the connector body is butted against a surface of the circuit board, the connector body further including: an outer housing, an inner housing, fitted to the outer housing so as to be slidable in the outer housing along a fitting direction along which the connector body and the connector receiving member are fitted to each other, and housing the terminal fitting so that a tip portion is projected from the tip end surface (41 a) of the connector body, and a housing urging spring, disposed between the inner housing and the outer housing in a compressed state urging the inner housing in the fitting direction along which the connector body and the connector receiving member are fitted to each other, and a contact portion of the terminal fitting pressingly contacting with the contact pattern, thereby causing the terminal fitting to be electrically connected to the contact pattern. an outer housing, an inner housing, fitted to the outer housing so as to be slidable in the outer housing along a fitting direction along which the connector body and the connector receiving member are fitted to each other, and housing the terminal fitting so that a tip portion is projected from the tip end surface (41 a) of the connector body, and a housing urging spring, disposed between the inner housing and the outer housing in a compressed state urging the inner housing in the fitting direction along which the connector body and the connector receiving member are fitted to each other, and a contact portion of the terminal fitting pressingly contacting with the contact pattern, thereby causing the terminal fitting to be electrically connected to the contact pattern.