Abstract: In a seam forming method and device for a sewing machine for embroidery, wherein a contour of a figure to be embroidered is converted into positional co-ordinates and read, data is calculated for alternately setting needle location points on opposing portions of the contour in such a manner that embroidery seams is formed in the contour corresponding to the positional co-ordinates thus read, and the data are read out and a needle is vertically moved to form the embroidery seams, with a taboret being moved in directions X and Y, with a figure including at least one side having a circular arc-shaped contour out of two opposing sides, needle location points are set at regular intervals circumferentially on a circular arc-shaped side, and needle location points on a side opposed to the circular arc-shaped side are set at points of intersections of the side opposed to the circular arc-shaped side with radial lines from the center of the circular arc passing through the midpoint of the needle location points on the