Abstract: An embroidery stitch formation device for sewing machine comprising an outer cylinder which is mounted around a needle bar movable up and down in unison with the motion thereof, a nipple fitted to the lower end of the outer cylinder, passages for needle thread and cord provided slantwise through a frame and the outer cylinder, a rotary ring rotatably arranged on the outer cylinder having a driver gear on the upper portion thereof, a support arm provided with a tilted shaft on which is mounted a bobbin for bobbin thread, the support arm being positioned fixedly on the outer periphery of the rotary ring and a guide bar having guide holes for bobbin thread being mounted on the rotary ring, and while a lockstitch seam is being formed by a piece of needle thread and a piece of lockstitch thread, a piece of cord supplied through a passageway down to the needle in parallel therewith is wound with turns of bobbin thread supplied from the bobbin rotating around the outer cylinder by means of a rotating rotary ring, th