Abstract: In data projection device, a liquid crystal display panel which forms a data pattern, such as the date, as a translucent area, is positioned in the middle of an optical path located between an ambient light inlet and a photographic film. A data projection shutter which can work in conjunction with a photographic shutter, is positioned on the side of the film relative to a liquid crystal display panel. Manual projection optical path switching device is arranged in a data projection shutter and switches between the state in which the data projection shutter operates in conjunction with the photographic shutter and a state in which an interlock between the data projection shutter and the photographic shutter is released.