There is provided a slide fastener. A pair of fastener element rows are respectively sewn to opposing tape side edge portions of a pair of fastener tapes with sewing threads. Each of the fastener element rows has a plurality of fastener elements. A slider is configured to engage and disengage the pair of fastener element rows. The pair of fastener tapes and the pair of fastener element rows are colored in different colors. The slide fastener is used such that the fastener element rows are at a back side. A width dimension of a gap between the pair of fastener tapes is set to be 10 to 25% of a width dimension of the pair of fastener element rows that are engaged with each other. The color of the fastener element rows is visible through the gap from a front side of the slide fastener.