Abstract: A photographing mechanism for a moving body camera, namely a slit camera, utilized for judgement of arrival order in horse race, etc. A light array 18 consisting of vertically arrayed plural LEDs is located closed to film 4. A light emission control box 17 illuminates and unilluminates the LEDs in response to dot data of characters to be recorded. Hence, as the film 4 is rewound, the film 4 is exposed by the LEDs, so that the characters are recorded on the film.