Ball joint, in particular for vehicles, - comprising a ball stud as the inner bearing part and as a first bearing component, wherein the ball stud comprises a ball portion as a spherical thickening and one connection lug projecting from the ball portion or two opposite connection lugs (5, 6) projecting from the ball portion, - comprising a bearing housing as a second bearing component, which surrounds the ball portion, - comprising at least one elastomer element, arranged under preload between the ball portion and the bearing housing, and enclosing the ball portion, wherein the ball stud comprises an elongated metallic shaft portion, which forms the one or the two connection lugs (5, 6), and an integrally and materially uniform ball core portion adjoining the shaft portion, and wherein, to form the ball portion, two plastic half-shells (12, 13) are fitted onto the metallic ball core portion, which form a spherical thickening, wherein the two plastic half-shells abut one another with shell edges (14, 15) along a parting plane, and rest in a form-fitting manner with an inner shell contour as counter-contour against the outer contour of the ball core portion, thereby enclosing the ball core portion with the spherical thickening transverse to the lug direction, characterized in that the two plastic half-shells (11, 12) each have a bulge as thickening in the central region, that the two plastic half-shells (11, 12) are fitted radially onto the ball core portion transverse to the lug direction, and abut each other with shell edges (15, 16) along a parting plane extending in the lug direction, the two bulges forming the ball portion, or that the two plastic half-shells (11, 12) each have an axial through-opening and a bulge in the side region, wherein the two plastic half-shells (11, 12) are fitted axially onto the ball core portion in the lug direction and abut one another with shell edges along a parting plane extending in the lug direction such that the two mutually facing bulges form the thickening as the ball portion. - comprising a ball stud as the inner bearing part and as a first bearing component, wherein the ball stud comprises a ball portion as a spherical thickening and one connection lug projecting from the ball portion or two opposite connection lugs (5, 6) projecting from the ball portion, - comprising a bearing housing as a second bearing component, which surrounds the ball portion, - comprising at least one elastomer element, arranged under preload between the ball portion and the bearing housing, and enclosing the ball portion, wherein the ball stud comprises an elongated metallic shaft portion, which forms the one or the two connection lugs (5, 6), and an integrally and materially uniform ball core portion adjoining the shaft portion, and wherein, to form the ball portion, two plastic half-shells (12, 13) are fitted onto the metallic ball core portion, which form a spherical thickening, wherein the two plastic half-shells abut one another with shell edges (14, 15) along a parting plane, and rest in a form-fitting manner with an inner shell contour as counter-contour against the outer contour of the ball core portion, thereby enclosing the ball core portion with the spherical thickening transverse to the lug direction, characterized in that the two plastic half-shells (11, 12) each have a bulge as thickening in the central region, that the two plastic half-shells (11, 12) are fitted radially onto the ball core portion transverse to the lug direction, and abut each other with shell edges (15, 16) along a parting plane extending in the lug direction, the two bulges forming the ball portion, or that the two plastic half-shells (11, 12) each have an axial through-opening and a bulge in the side region, wherein the two plastic half-shells (11, 12) are fitted axially onto the ball core portion in the lug direction and abut one another with shell edges along a parting plane extending in the lug direction such that the two mutually facing bulges form the thickening as the ball portion. wherein the ball stud comprises an elongated metallic shaft portion, which forms the one or the two connection lugs (5, 6), and an integrally and materially uniform ball core portion adjoining the shaft portion, and wherein, to form the ball portion, two plastic half-shells (12, 13) are fitted onto the metallic ball core portion, which form a spherical thickening, wherein the two plastic half-shells abut one another with shell edges (14, 15) along a parting plane, and rest in a form-fitting manner with an inner shell contour as counter-contour against the outer contour of the ball core portion, thereby enclosing the ball core portion with the spherical thickening transverse to the lug direction, characterized in that the two plastic half-shells (11, 12) each have a bulge as thickening in the central region, that the two plastic half-shells (11, 12) are fitted radially onto the ball core portion transverse to the lug direction, and abut each other with shell edges (15, 16) along a parting plane extending in the lug direction, the two bulges forming the ball portion, or that the two plastic half-shells (11, 12) each have an axial through-opening and a bulge in the side region, wherein the two plastic half-shells (11, 12) are fitted axially onto the ball core portion in the lug direction and abut one another with shell edges along a parting plane extending in the lug direction such that the two mutually facing bulges form the thickening as the ball portion.