Abstract: A child's car booster seat that cooperates with the automobile's existing safety belt restraint system is disclosed. A contoured seat bottom elevates the child above the existing automobile seat. A frontal shield is fixed pivotally and slidably along one side of the seat and removably fitted at the other side of the seat to lock into variable positions on the booster seat. A channel traversing the front of the shield accepts the automobile's lap safety belt for securing the booster seat to the automobile's existing car seat. In an open position, the upper surface of the booster seat is completely exposed to permit positioning of the child. The shield can then be pivoted, adjusted and locked with one hand to restrain the child. The automobile's safety belt is then extended across the shield to secure the booster seat to the automobile's existing car seat.