Abstract: A protector for a rear seat of a vehicle includes a seat cushion and a back pad, wherein the back pad includes a left back pad and a right back pad, the left back pad and the right back pad are respectively provided with a first engaging portion and a second engaging portion, the left back pad and the right back pad are respectively oppositely provided with a first notch and a second notch, the first notch, the second notch and the corresponding partial edge of the seat cushion form a receiving hole, the receiving hole is matched with the vertical cross section of the open state of a central armrest, the protector further includes a cover portion that selectively opens or covers the receiving hole. The protector can provide more comprehensive protection for the rear seat of the vehicle.