The slide fastener includes elements and a slider, wherein each of the elements includes a horizontal functional section an upper vertical functional section and a lower vertical functional section the slide fastener includes a plurality of fastener units in each of which the elements are arranged to oppositely face each other and the meshing portions are meshed with each other by sliding the slider between the oppositely-positioned elements, whereby the engagement pieces of the oppositely-positioned elements form an engagement portion and the engagement holding pieces of the oppositely-positioned elements in pair form an engagement holding portion, and the plurality of fastener units are constituted in a multilayered structure by engaging the engagement holding portions of a second fastener with the engagement portions of a first fastener such that the engagement holding portions of a new fastener unit are engaged with the engagement portions of a preceding fastener unit.