A variable spoiler apparatus for a vehicle may include a driving portion including a gear set configured to provide a predetermined speed reduction ratio, wherein a driving motor and a driving shaft for supplying rotational force of the driving motor may be connected to the gear set, and a linkage, wherein a base bracket to which the driving shaft of the driving portion may be connected may be provided on the linkage, wherein the linkage includes a plurality of links that may be connected to a spoiler bracket connected to the driving shaft, the base bracket and a spoiler, and wherein the plurality of links may be rotated together with the driving shaft when the driving motor of the driving portion operates thereby to draw out or stow the spoiler such that angle and height of the spoiler may be varied.