A radiographic apparatus includes an x-ray detection sensor having a two-dimensional detector plane for detecting an intensity distribution of x-rays, a body internally containing the x-ray detection sensor, a supporting member having a supporting surface for supporting the x-ray detection sensor across the detector plane and which fixes the x-ray detection sensor to an inner bottom surface of the body, and a circuit board on which is mounted a circuit for reading out a detection signal from the x-ray detection sensor. Furthermore, in the radiographic apparatus, the supporting member forms a space between the supporting member and the inner bottom surface of the body in a peripheral portion of the supporting member. At least a part of the circuit board is arranged in the space.