Adjusting device for a motor vehicle headlamp for adjusting at least one optically relevant structural unit of the motor vehicle headlamp, the adjusting device comprising the following: - a base body which is arranged in a fixed position with respect to the at least one optically relevant structural unit to be adjusted, - a sliding body which is mounted on the base body so as to be displaceable along a displacement axis and is designed to engage with the at least one optically relevant structural unit, - a drive device, which is arranged in a fixed position in relation to the at least one optically relevant structural unit to be displaced, is preferably arranged on the base body, and is set up to engage on the sliding body and to displace it along the displacement axis, so that the at least one optically relevant structural unit is moved during a displacement movement of the sliding body by the drive device, wherein the sliding body is mounted on the base body by means of a guide device, wherein the guide device is arranged to guide the sliding body driven by the drive device along the displacement axis on the base body, wherein the guide device comprises at least one rolling bearing, at least one rolling body being mounted in the at least one rolling bearing, the at least one rolling body being mounted in the at least one rolling bearing in such a way that, during the displacement movement of the sliding body along the displacement axis, the at least one rolling body guides the sliding body during the displacement movement along the displacement axis relative to the stationary base body, characterized in that the at least one rolling bearing comprises a first and a second bearing shell (400a, 400b), wherein the first bearing shell is arranged on the base body and the second bearing shell is arranged on the sliding body, wherein the first and second bearing shells (400a, 400b) jointly form the at least one rolling bearing by bringing the two bearing shells (400a, 400b) together, and wherein the at least one rolling body is mounted in the at least one rolling bearing in such a way that the at least one rolling body bears against the first and second bearing shells (400a, 400b), so that during the displacement movement of the sliding body along the displacement axis the second bearing shell causes a rolling movement of the at least one rolling body, wherein the at least one rolling body guides the second bearing shell relative to the stationary first bearing shell during the displacement movement along the displacement axis by the rolling movement. - a base body which is arranged in a fixed position with respect to the at least one optically relevant structural unit to be adjusted, - a sliding body which is mounted on the base body so as to be displaceable along a displacement axis and is designed to engage with the at least one optically relevant structural unit, - a drive device, which is arranged in a fixed position in relation to the at least one optically relevant structural unit to be displaced, is preferably arranged on the base body, and is set up to engage on the sliding body and to displace it along the displacement axis, so that the at least one optically relevant structural unit is moved during a displacement movement of the sliding body by the drive device, wherein the sliding body is mounted on the base body by means of a guide device, wherein the guide device is arranged to guide the sliding body driven by the drive device along the displacement axis on the base body, wherein the guide device comprises at least one rolling bearing, at least one rolling body being mounted in the at least one rolling bearing, the at least one rolling body being mounted in the at least one rolling bearing in such a way that, during the displacement movement of the sliding body along the displacement axis, the at least one rolling body guides the sliding body during the displacement movement along the displacement axis relative to the stationary base body, characterized in that the at least one rolling bearing comprises a first and a second bearing shell (400a, 400b), wherein the first bearing shell is arranged on the base body and the second bearing shell is arranged on the sliding body, wherein the first and second bearing shells (400a, 400b) jointly form the at least one rolling bearing by bringing the two bearing shells (400a, 400b) together, and wherein the at least one rolling body is mounted in the at least one rolling bearing in such a way that the at least one rolling body bears against the first and second bearing shells (400a, 400b), so that during the displacement movement of the sliding body along the displacement axis the second bearing shell causes a rolling movement of the at least one rolling body, wherein the at least one rolling body guides the second bearing shell relative to the stationary first bearing shell during the displacement movement along the displacement axis by the rolling movement.