A slide fastener of the present invention comprises a first fastener stringer, a second fastener stringer, and a slider for coupling or separating the first and second fastener stringers, wherein, when the first fastener stringer and the second fastener stringer are coupled in a vertical direction, the second fastener stringer separated from the slider is inserted into the slider. Therefore, when a fixing pin and an insert pin are coupled in the vertical direction by first and second coupling pieces, a row of fastener elements of the second fastener stringer separated from the slider is inserted into the slider so as to enable convenient coupling.