| 摘要 |
PURPOSE: A golf ball is provided to improve the accuracy of putting by preventing the golf ball from receiving irregular resistance from interference between grass and a concave groove if the putting of the golf ball is done in the extending direction of a plane part. CONSTITUTION: A golf ball includes multiple concave grooves(1) which are formed on the surface; and a strip-shaped plane part(10) which is formed in a ring shape according to the circumference of the golf ball in a part where the concave groove is not formed on the surface of the golf ball. The width of the plane part is 1-10mm. The plane part is formed in a height which is the same with the boundary surface of the golf ball. The plane part is comprised in multiple numbers and is mutually crossed at two points of the golf ball surface. Each plane part is separated from each other around a crossing point at an identical angle.
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