To completely automate (operation without operator) the sewing process of panty house by opening a welt part of a stocking cloth sucked and transported through a pipe by utilizing the suction sream to constitute the opening part such that the opening part is automatically delivered to an attaching arm.

Since a suction sream generated in a suction hose 11 acts up to the extending end of a supply pipe D, when a stocking cloth S is supplied from a welt part W side at the extending end of the supply pipe D, the cloth S is sucked and transported the pipe C. When, then, a sensor 45 detects the welt W, a pinching means 41 is operated to pinch the cloth S, while the attraction is doubled to prolong the cloth S and place the welt part W in a pipe B. Under such condition, the pipe C is moved rightward by the drive of a motor M to turn up outward the welt part W put into a projection part 14a with the suction stream and turn inside out the welt part W for covering the outer peripheral edge of the pipe B. Thereafter, the welt part W is delivered onto an attaching arm 47.