To obtain the soft touch while keeping the capacity as a ball, in a ball for a ball game having a skin layer formed by sewing the peripheries of leather panels, by curving the sewing lines formed along the peripheries of the leather panels toward the centers of the leather panels.
The skin layer 5 of a soccer ball 4 consists of, for example, 20 equilateral hexagonal leather panels 6 and 12 equilateral pentagonal panels 7 and the peripheries of the leather panels 6, 7 are folded inside to be sewn by yarn to be formed into a spherical shape as a whole. Packing layers composed of cloth are bonded to the rear surfaces of the leather panels 6, 7 and compressed air is sealed in the hollow spherical rubber tube housed in the skin layer 5. When the leather panels 6, 7 are sewn by yarn, the corner parts where the sides of three leather panels 6, 6, 7 cross each other are largely depressed toward the center of the ball and deep cavities are formed at a region where three grooves formed to stitches cross each other.
NAGAO YUKINORI
KURIKI HIDESUKE
YAMAGUCHI ATSUSHI
