A support stand for a flat-panel display monitor, includes a base member and an elevating mechanism positioned on the base member. The elevating mechanism includes a support bracket including base portion, an elevating member slidably connected to the support bracket, a pair of guiding members fixed on the support bracket, a pair of rollable members connected to opposite sides of the elevating member, and a resilient member. Each guiding member includes a guiding surface and a distance between the guiding surfaces decreases from an upper end to a lower end of each guiding member. The rollable members move along the guiding surface. The resilient member is positioned between the rollable members to push the rollable members to press the guiding surfaces.