To provide an image input device which can properly read images of films of different types according to respective picture sizes and input them to a computer.

The film image input device 1 which reads an image on a film as an original and converts it into a digital signal is so constituted that selected one of a film adapter capable of holding a 35 mm film and an adapter capable holding a film cartridge film adaptive to a new system can be mounted in a groove part 2 of a device main body 1a; and the image of the loaded film is read by a linear CCD image sensor and inputted to the computer, etc.