The backrest and the seat are provided integrally with each other, and a bracket for connecting the backrest and the seat to the back is integrally formed on both sides of the back of the backrest Wherein a plurality of metal plate members corresponding to the shape of the bracket are formed and a support hole corresponding to the metal plate member and the bracket is formed so that the positioning bars are connected to each other in the crossing direction, The present invention relates to a lightweight car seat capable of being rearward viewed.;
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