INSERT NUT INSERTION STRUCTURE

Provided is an insert nut insertion structure, including an insert nut including a bolt fastening portion having threads on an inner circumference into which a bolt is screwed; and a flange portion provided on an outer circumference of the bolt fastening portion and extended in a circumferential direction of the bolt fastening portion; and a nut fixing groove into which the insert nut is inserted in a first direction perpendicular to a direction in which the bolt is screwed, wherein the nut fixing groove includes a flange receiving portion having an internal space conforming to a shape of the flange portion; and a pair of fingers provided on the flange portion positioned in the flange receiving portion and formed in a cantilever shape that surrounds, in part, a periphery of the bolt fastening portion.