A child seat includes a seat body, a base, and a mechanism for simultaneously sliding the seat body forward as the seat body is rotated relative to the base. This rotation sliding mechanism includes a cam plate connected to the seat body and an abutting plate connected to the base. When the seat body is in a forward-facing position, one side of the cam plate is entirely abutted against the abutting plate. When the cam plate is rotated by 45°, the cam plate moves toward the front while a corner of the cam plate abuts against the abutting plate. With this structure, the child seat has enhanced securing stability relative to a vehicle seat and can facilitate in-vehicle handling.
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