A seat slide apparatus for a vehicle includes: a lower rail freely fixed to a vehicle floor and having a pair of first vertical wall portions, a bottom wall portion, and a pair of first flanges; an upper rail fixed to a seat having a seat cushion and a seatback, and having a pair of second vertical wall portions, a lid wall portion, and a pair of second flanges; a locking member connected to the upper rail; a memory piece placed on the bottom wall portion, engages with the upper rail due to an upward urging force by a memory piece urging member; a memory link connected to the upper rail; a lever member connected to an upper portion of the upper rail; and a stopper member fixed to the inside of the upper rail.