A connector structure assembly, including: a female connector (A 1) provided with a flexible circuit board (A 3) including female terminal portions comprising an insulating film having flexibility, a plurality of pad portions formed on one face of the insulating film, conductor circuit patterns drawn out of the pad portions, first through-holes formed in a thickness direction of the insulating film within faces of the pad portions, and small holes communicating coaxially with the first through-holes and formed within the faces of the pad portions; and a female-side engaging member (A 4) which is a foil-like body fixedly arranged on the opposite face of the flexible circuit board from a formation face of the pad portions thereof, and which female-side engaging member has second through-holes, with a size larger than that of the first through-holes, and communicates coaxially with the first through-holes in the female terminal portions, and the second through-holes being formed in a thickness direction of the foil-like body; and a male connector (A 2) provided with a circuit board including male terminal portions comprising an insulating member, connecting pins formed in a projecting manner on one face of the insulating member at positions corresponding to the female terminal portions, and conductor circuit patterns drawn out of proximal portions of the connecting pins; and a male-side engaging member (A 6) which is fixedly arranged on the same face as a formation face of the connecting pins of the circuit board and is engaged with the female-side engaging member, wherein the female-side engaging member is fixedly arranged on the flexible circuit board with each of the female terminal portions, and each of portions of the flexible circuit board positioned in the vicinities of the female terminal portions, are positioned within a face of a respective one of the second through-holes, and such that the other portions of the flexible circuit board and the female-side engaging member are integrated with each other. a female connector (A 1) provided with a flexible circuit board (A 3) including female terminal portions comprising an insulating film having flexibility, a plurality of pad portions formed on one face of the insulating film, conductor circuit patterns drawn out of the pad portions, first through-holes formed in a thickness direction of the insulating film within faces of the pad portions, and small holes communicating coaxially with the first through-holes and formed within the faces of the pad portions; and a female-side engaging member (A 4) which is a foil-like body fixedly arranged on the opposite face of the flexible circuit board from a formation face of the pad portions thereof, and which female-side engaging member has second through-holes, with a size larger than that of the first through-holes, and communicates coaxially with the first through-holes in the female terminal portions, and the second through-holes being formed in a thickness direction of the foil-like body; and a male connector (A 2) provided with a circuit board including male terminal portions comprising an insulating member, connecting pins formed in a projecting manner on one face of the insulating member at positions corresponding to the female terminal portions, and conductor circuit patterns drawn out of proximal portions of the connecting pins; and a male-side engaging member (A 6) which is fixedly arranged on the same face as a formation face of the connecting pins of the circuit board and is engaged with the female-side engaging member, wherein the female-side engaging member is fixedly arranged on the flexible circuit board with each of the female terminal portions, and each of portions of the flexible circuit board positioned in the vicinities of the female terminal portions, are positioned within a face of a respective one of the second through-holes, and such that the other portions of the flexible circuit board and the female-side engaging member are integrated with each other.