A radiation imaging device comprising: a planar scintillator film which emits light with a predetermined wavelength in response to an incident of X-ray; an image sensor which includes: a rectangular substrate having a photodetecting section for detecting the light with a predetermined wavelength emitted by the scintillator film, the photodetecting section positioned opposite to an X-ray incident surface, and an electrode section arranged on the same side of the substrate as the photodetecting section, the electrode section being arranged in a region outside the photodetecting section wherein the photodetecting section is in contact with one of the surfaces of the scintillator film, and the electrode section is projected and exposed to the outside of the scintillator film; and a circuit board comprising: a substrate a circuit part, and an electrode section wherein the circuit part and the electrode section of the circuit board are mounted on the substrate of the circuit board, the circuit board is disposed on the other surface of the scintillator film, the circuit board is arranged so as to expose the electrode section of the image sensor, and the electrode section of the circuit board is electrically connected to the electrode section of the image sensor by a wire. a planar scintillator film which emits light with a predetermined wavelength in response to an incident of X-ray; an image sensor which includes: a rectangular substrate having a photodetecting section for detecting the light with a predetermined wavelength emitted by the scintillator film, the photodetecting section positioned opposite to an X-ray incident surface, and an electrode section arranged on the same side of the substrate as the photodetecting section, the electrode section being arranged in a region outside the photodetecting section wherein the photodetecting section is in contact with one of the surfaces of the scintillator film, and the electrode section is projected and exposed to the outside of the scintillator film; and a rectangular substrate having a photodetecting section for detecting the light with a predetermined wavelength emitted by the scintillator film, the photodetecting section positioned opposite to an X-ray incident surface, and an electrode section arranged on the same side of the substrate as the photodetecting section, the electrode section being arranged in a region outside the photodetecting section wherein the photodetecting section is in contact with one of the surfaces of the scintillator film, and the electrode section is projected and exposed to the outside of the scintillator film; and a circuit board comprising: a substrate a circuit part, and an electrode section wherein the circuit part and the electrode section of the circuit board are mounted on the substrate of the circuit board, the circuit board is disposed on the other surface of the scintillator film, the circuit board is arranged so as to expose the electrode section of the image sensor, and the electrode section of the circuit board is electrically connected to the electrode section of the image sensor by a wire. a substrate a circuit part, and an electrode section wherein the circuit part and the electrode section of the circuit board are mounted on the substrate of the circuit board, the circuit board is disposed on the other surface of the scintillator film, the circuit board is arranged so as to expose the electrode section of the image sensor, and the electrode section of the circuit board is electrically connected to the electrode section of the image sensor by a wire.