OCCUPANT STATE MONITORING APPARATUS

An occupant state monitoring apparatus includes an imager and a calculation controller. The imager is configured to capture an image of a region including an eyeball of an occupant who is in a vehicle, to obtain an image. The calculation controller is configured to detect, based on a part of the eyeball reflected in the image, a line of sight of the occupant and a device disposed in a compartment of the vehicle, and monitor a state of the occupant based on the device and a change in the line of sight.