Abstract: A Child Seat monitoring system for use in automobiles. An optical arrangement is situated in the vehicle such that a driver of the vehicle may view the occupant of the Child Seat for position, disposition or presence in the seat. The Child Seat contains a sensing device to detect the presence or not of an occupant. An alarm is given when the driver's door of the vehicle is opened and the Child Seat is occupied. The optical system includes lights for illumination of the Child Seat. The optical system may be used separately from the Seat sensors or vice versa.