Abstract: An apparatus is provided which supports a seated infant in a shopping cart. Side members comfortably support the infant in an upright position while allowing the infant to move his head and arms freely. The backrest is padded and made of a flexible material that conforms to an infant's posture when seated. The base is padded and has an extension providing additional comfort to the infant's legs when seated. An attachment strap holds the liner into the child seat, while a restraining strap holds the child within the liner. The upper portion of the backrest folds down for easy storage and transportation of the liner when not in use. The liner is specifically configured to work cooperatively with a wire basket construction shopping cart having protruding wires which provide discomfort to a child sitting within the child seat without a liner.