Abstract: Disclosed is a ball sleeve structure. The ball sleeve structure has convex ball portions and grooves. The convex ball portions are formed at the middle of its outer circumference and are tightly coupled within a ball race in a housing of a variety of joints. The grooves are formed at both sides of its outer circumference and are coupled with sealing boots. The ball portions are formed at regular thickness in the whole portions, by swaging predetermined portions in a hollow tube with holes at the center thereof, such that a metal flow is continuously connected. The ball sleeve structure can be simply and easily manufactured and has excellent strength and reduced amount of material, thereby being capable of achieving a reduction in the manufacturing costs and a reduction in the weight of the product.