The present invention provides an occupant imaging device comprising: a camera (23) that captures an image of an area around the face of an occupant seating in a seat inside a cabin of a vehicle; and in-vehicle light emitters (16, 19, 22, 25, 26, 27, 28) that emit light having an illumination component necessary for the camera to capture the image of the occupant to be imaged. The camera performs the imaging operations at a timing when the light is being emitted from the in-vehicle light emitters.