A divider configured to be secured in the seats of automobiles for forming a physical barrier between passengers is disclosed herein. The divider can be used for children, pets, or adults. A rectangular prism shaped booster may be provided below the divider for raising the height of the divider. The profile of the divider is designed to fit securely against the back of a seat and the bottom of the seat. The curved front side of the divider allows the driver to view all passengers, maintain views out the windows, and still be an effective barrier without being so large as to be in the way. A notch is provided in the curved front side of the divider for receiving a seat belt or strap for securing the divider. The divider and the booster may have removable covers with pockets for holding items, such as water bottles, tissues, and wipes.