Removable expanding fastener

A fastener made of synthetic resin or the like for removably fixing a plurality of plate-like members, said fastener comprising a female member and a male member, said female member comprising a base plate formed with a hole into which a shaft portion of said male member is inserted, a pair of opposed stoppers of substantially W-shape in section provided with a pair of leg portions extending from a lower surface of said base plate along an edge portion of said hole and a pair of engagement portions upwardly extending from lower ends of said leg portions and arranged in opposed relation with each other, and a pair of engagement projections inwardly projecting from an inner periphery of said hole;

• said male member comprising a head portion, a shaft portion provided with a neck portion downwardly extending from said head portion and a flat portion downwardly extending from said neck portion and adapted to be inserted into said hole, said flat portion being provided with a pair of stop projections and shoulders adapted to be engaged with said engagement projections at an upper portion thereof, said flat portion being formed with a hollow portion opened at a lower end thereof to thereby form a substantially sectionally rectangular cylindrical shape, wherein said engagement portions of said stopper are rotatably fitted in said hollow portion, and said leg portions and said engagement portions are elastically deformed to be spread and contracted in interlocking relation with each other.