Abstract: A combined booster cushion and bag (1), comprising carrying means (5, 16), a storage member (2) and a booster cushion member (4) having a user-facing side (3). The storage member (2) is configured to be releasably joined to the user-facing side (3) of said booster cushion member (4). With a combined booster cushion and bag according to the present invention, the availability of the booster cushion is greatly increased, for example since the risk of leaving behind the booster cushion member is reduced. Thereby the safety of children and others travelling in a motor vehicle is improved.