| 摘要 |
The present invention achieves a locking member of a vehicle seat device, a vehicle seat device, and a seat placement body, in which the lateral movement amount of the seat when receiving lateral movement acceleration can be suppressed without reducing the length of the engaging portion of the striker. The solution is a locking member provided with a striker, and a movement restriction member which is fixed to at least one side piece so that positions in the leftward/rightward direction of at least one part of the movement restriction member are the same as those of the left and right curved corner portions, wherein the movement restriction member includes a side spacer which forms a gap in the leftward/rightward direction between the engaging portion and the lock mechanism, to which the engaging portion is engaged.
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