Abstract: A seat position adjusting apparatus for a vehicle includes a lower rail, an upper rail moved relatively with the lower rail, a locking mechanism restricting relative movement between the lower rail and the upper rail and releasing restriction on the relative movement, an operating member releasing restriction of the locking mechanism on the relative movement between the lower rail and the upper rail, a position memorizing mechanism for memorizing a position of the upper rail relative to the lower rail, a memorized position releasing member releasing the memorized position of the upper rail relative to the lower rail, wherein the position memorizing mechanism includes a movable member, an engaging member and a biasing member that has a first operating arm portion and a second operating arm portion that are positioned at two points on the engaging member with maintaining a predetermined distance therebetween in order to exert the operation force at the two points.