Seat slide apparatus for vehicle

A seat slide apparatus for a vehicle includes a first rail (3), a second rail (4), a lock member (26), a plurality of engagement bores (12a) including a rear end engagement bore (37), a front end portion of the rear end engagement bore being further positioned in a forward direction than a rear end of the second rail (4) in a state where the second rail is positioned at a foremost position, a rear end portion of the rear end engagement bore (37) being exposed to a rear of the rear end of the second rail (4), a memory member (30), a holding member (60, 50) holding the memory member to move integrally with the second rail (4) or holding the memory member to engage with one of the engagement bores (12a), and an auxiliary bracket (41) restricting a movement of the memory member (30) that engages with the front end portion of the rear end engagement bore (37) towards the rear end portion thereof.