An emergency reporting system includes a seat belt detection unit, a speed change detection unit, an injury determination unit, and an emergency reporting unit. The seat belt detection unit detects a fastening state of seat belt when the vehicle stops moving assisted by collision prevention process that prevents vehicle collision in advance. The speed change detection unit detects a speed change during a time interval from when the collision prevention process is performed to when the vehicle is stopped. The injury determination unit determines the injury level of the vehicle occupant based on the detection results of the seat belt detection unit and the speed change detection unit. The emergency reporting unit emergently reports determined injury level of the vehicle occupant to a prescribed reporting destination. The emergency reporting system can properly determine the injury level of the vehicle occupant when vehicle collision is prevented in advance, and can emergently report the determined injury level.
