A seat slide apparatus for a vehicle includes: a lower rail freely fixed to a vehicle floor; an upper rail freely fixed to a seat having a seat cushion forming a seating surface and a seatback; and a memory member engaging with the upper rail, wherein the memory member includes: a memory base provided to be movable in a forward-rearward direction of the seat; a memory pin mounted to be movable back and forth in a vertical direction with respect to the memory base; a first urging member urging the memory pin; a locking plate mounted to be movable in the forward-rearward direction of the seat with respect to the memory base; and a second urging member urging the locking plate.