SEAT SLIDING APPARATUS FOR VEHICLES

A seat sliding apparatus for a vehicle is provided. The seat sliding apparatus may include a lead screw configured to define a first toothed part on an outer circumferential surface thereof, and disposed in forward and rearward directions of a vehicle, a worm gear rotated by a driving motor, a transmission gear assembly engaged with the worm gear to be rotated, a power transmission belt engaged with the transmission gear assembly, and a nut unit including a first nut configured such that a second toothed part engaged with the first toothed part is defined on an inner circumferential surface thereof, and a second nut configured to come into contact with the power transmission belt.