A peripheral image generation device acquires a plurality of camera images obtained from a plurality of cameras each of which captures a periphery of the vehicle. The peripheral image generation device stores a traveling direction camera image that is a part or all of images included in the plurality of camera images and captured at least in a traveling direction of the vehicle. The peripheral image generation device generates an underfloor transparent image that is a composite image transmitting a bottom of the vehicle based on the plurality of camera images and the traveling direction camera image.