The invention relates to a fastener. The fastener includes: a lower fastening base, in which a pivoting plate is disposed upward on a back end of the lower fastening base and concavely disposed with a limiting groove, an upper fastening plate, disposed on the lower fastening base in a covering manner, in which a back end of the upper fastening plate has at least one pivoting portion pivotally connected to the pivoting plate, a limiting portion, extending backward from the upper fastening plate and penetrating the limiting groove correspondingly, at least one stop block, convexly extending from the limiting portion and located behind the pivoting plate, and a fixing part, disposed on a frond end of the lower fastening base and used for fixing the upper fastening plate to the lower fastening base.