An incorporated slide fastener that is incorporated simultaneously with the weaving of the fastener tape for a zigzag-type continuous element. The weft yarn of the fastener tape is woven with one thread traversing and doubling back in the tape width direction, forming a set of two threads. Fastener elements have: engaging heads; first and second leg portions that each extend in the width direction of the tape; first connecting portions that connect first legs that are adjacent in the longitudinal direction of the tape; and second connecting parts that connect second legs that are adjacent in the longitudinal direction of the tape. Of the two yarns configuring the weft yarn, one yarn is woven diagonally straddling the first surface of a first leg and the second surface of a second leg of adjacent fastener elements.