Seat slide apparatus for vehicle

摘要

A seat slide apparatus for a vehicle includes a first rail (3) including a locked portion (13c), a second rail (4) movably connected relative to the first rail (3) and including bearing holes (17), a lock member (30) including a lock portion (37) and rotating around the bearing holes (17) to engage the lock portion (37) with the locked portion (13c) and disengage the lock portion (37) from the locked portion (13c) to selectively bring a relative movement between the first rail (3) and the second rail (4) into a locked state, and wherein the second rail (4) includes a fracture opening (18, 71) allowing the shaft portion (22) to shift from the bearing hole (17) in a case where a load is inputted in the direction of the relative movement, and a restriction portion (19b) configured to restrict the lock member (30) from rotating in a direction in which the locked state is released in a case where the shaft portion (22) shifts from the bearing hole (17).