Dust cover for ball joint

A dust cover for a ball joint including a ball stud (200) provided with a ball member (210) and a rod member (220) extending to one side from the ball member (210), the dust cover (500) comprising:

• a rod-member coupling portion (510) coupled to a dust-cover mounting portion (230) formed on the rod member (220) of the ball stud (200),
• wherein the rod-member coupling portion (510) includes a first sealing portion (512) in contact with one side surface (230b) of the dust-cover mounting portion (230),
• wherein the first sealing portion (512) includes a first inclined surface (515) having a first inclination angle α with respect to an imaginary plane A perpendicular to a central axis of the ball stud (200), and a second inclined surface (514) having a second inclination angle β with respect to the imaginary plane A perpendicular to the central axis of the ball stud (200), and
• wherein the second inclination angle β is formed to be greater than the first inclination angle α so that the rod-member coupling portion (510) comes into contact with an end of the one side surface (230b) of the dust-cover mounting portion (230).