A method of manufacturing a slide fastener by cutting a long fastener chain, alternately having in a longitudinal direction thereof a pair of element rows meshing with each other and an interval portion lacking the element row, at a predetermined position of the interval portion, the method including the steps of: arranging a feed portion of the fastener chain on an upstream side of a chain cutting portion; positively transferring the fastener chain successively by the feed portion to the chain cutting portion along an inclined transfer path inclined downward; operating the chain cutting portion after waiting for the transfer of the fastener chain to stop and cutting the slide faster chain in a cross direction at the predetermined position of the interval portion; and making the cut slide fastener to be separated by the chain cutting portion slide down by its self weight along the transfer path.