A pivot , comprising: a sphere unit formed such that a through hole capable of holding a shaft member passes through a center of the sphere unit ; and a sliding guide unit arranged to be suspended or mounted on a guide unit of a lamp housing , characterized in that : the sphere unit has two leg units that connect the sphere unit to the sliding guide unit , the two legs units are formed so as to overlap a plane (L) that is orthogonal to an axial direction of the through hole and passes through the center, and to extend respectively from the left and right side surfaces of the sphere unit to the sliding guide unit as viewed from the front, so as to form as a space (S) an area surrounded by the sphere unit , the sliding guide unit , and the two leg units , the sliding guide unit includes a tabular plate and an elastic piece , and the two leg units are coupled to one surface of the plate and the elastic piece is coupled to the other surface of the plate; and a surface of the sphere unit surrounding the space (S) is a received surface to be borne in a vertical direction when mounted on the guide unit of the lamp housing when installed in a vehicle headlamp viewed from a front side on a lens side. a sphere unit formed such that a through hole capable of holding a shaft member passes through a center of the sphere unit ; and a sliding guide unit arranged to be suspended or mounted on a guide unit of a lamp housing , characterized in that : the sphere unit has two leg units that connect the sphere unit to the sliding guide unit , the two legs units are formed so as to overlap a plane (L) that is orthogonal to an axial direction of the through hole and passes through the center, and to extend respectively from the left and right side surfaces of the sphere unit to the sliding guide unit as viewed from the front, so as to form as a space (S) an area surrounded by the sphere unit , the sliding guide unit , and the two leg units , the sliding guide unit includes a tabular plate and an elastic piece , and the two leg units are coupled to one surface of the plate and the elastic piece is coupled to the other surface of the plate; and a surface of the sphere unit surrounding the space (S) is a received surface to be borne in a vertical direction when mounted on the guide unit of the lamp housing when installed in a vehicle headlamp viewed from a front side on a lens side. the sphere unit has two leg units that connect the sphere unit to the sliding guide unit , the two legs units are formed so as to overlap a plane (L) that is orthogonal to an axial direction of the through hole and passes through the center, and to extend respectively from the left and right side surfaces of the sphere unit to the sliding guide unit as viewed from the front, so as to form as a space (S) an area surrounded by the sphere unit , the sliding guide unit , and the two leg units , the sliding guide unit includes a tabular plate and an elastic piece , and the two leg units are coupled to one surface of the plate and the elastic piece is coupled to the other surface of the plate; and a surface of the sphere unit surrounding the space (S) is a received surface to be borne in a vertical direction when mounted on the guide unit of the lamp housing when installed in a vehicle headlamp viewed from a front side on a lens side. <EOS>