Abstract: The present invention relates to a booster seat comprising a seat shell with a lower face for supporting the seat shell and an upper face, on which a seat base and lateral seat cushion regions and backrest regions that delimit the seat base laterally and rearwards are provided. The lower face of the seat shell has a stacking contour which is designed to provide a stacking capability on the upper face of the seat shell. The invention also relates to a booster seat comprising a strap system that has four eyelets, wherein one retaining strap is allocated to a pair of eyelets. Two eyelets are arranged in the front outer region of each lateral seat cushion region, while two eyelets are arranged in the rear outer region of each lateral seat cushion region or in the lateral outer region of the back region. The invention further relates to a method for producing a booster seat of this type.