OCCUPANT MONITORING DEVICE FOR VEHICLE AND OCCUPANT PROTECTION SYSTEM FOR VEHICLE

An occupant monitoring device for a vehicle is configured to monitor an occupant sitting on a seat provided in the vehicle and includes a light projector, an imaging device, and a processor. The light projector is configured to project light toward the occupant sitting on the seat. The imaging device is configured to capture an image of the occupant sitting on the seat. The processor is configured to control the light projector and the imaging device to capture the image of the occupant sitting on the seat. In a case where a collision of the vehicle is neither predicted nor detected, the processor causes the imaging device to capture an image of behavior of the occupant corresponding to either one of travel control and behavior of the vehicle so as to change occupant protection control.