To provide a device for checking whether a photograph is surely taken before development by capturing IR rays transmitted through the film of the plane forming an image on the film by means of IR sensors at the back cover and film pressure plate of the camera for the purpose of checking whether the image is formed on the film within the camera without abnormality in a photographic shutter and diaphragm mechanism with the necessary device, when the photograph is needed without fail.

The film transmits the IR rays which arrive at the film pressure plate in the camera. A plurality of the IR sensors are arranged on the film pressure plate to capture the IR components of videos which are passed through amplifying and wavelength forming circuits. The signals from the sensors are processed in the amplifying circuits in the camera through a harness at the film pressure plate and the inside of the finder of the camera is provided with a display device, so that the sure exposure of the film without the failure is checked.