Abstract: A restraining device for use on a small child or person for holding him to a lap seat belt of a seat such as an automobile or airplane seat, comprises a vest provided with an adjustable vest belt attached around the bottom of the vest and buckling in front. A pair of adjustable straps attached at the vest belt at the front pass upward over the shoulders of the wearer and down the back, where they cross each other to the region of the vest belt at the back, where they are fastened. Loops are formed at the lower rear ends of the straps through which an ordinary lap seat belt attached at the seat, may be passed to hold the person to the seat.