Child's car seat, integral with the rear seat of motor vehicles

Child's car seat integral with the rear seat of a motor vehicle, consisting of at least two juxtaposed seats, including a bodywork made of a pair of basins (7, 8), one for the sitting and one for the back. Said basins are adapted to retain at least a pair of cushions (12, 13, 23, 33) which in their normal position form the sitting and the back (10, 11) of a seat for adult people, while in their upturned position they form the sitting and the back of a child's seat.