A radiation image capturing system comprising: a first image capturing apparatus for capturing a first radiation image of a subject by applying a radiation to the subject; a second image capturing apparatus for capturing a second radiation image of the subject by applying a radiation to the subject, the second image capturing apparatus having a specification different from that of the first image capturing apparatus; an image correcting device for correcting the second radiation image of the subject such that the second radiation image of the subject has the same magnification as the first radiation image of the subject; and a display unit for displaying the corrected radiation image, characterized in that the first image capturing apparatus has a first radiation source, a first image capturing base, a first radiation detector housed in the first image capturing base, and a first marker to be imaged together with the subject, the first marker being disposed on the first image capturing base, the second image capturing apparatus has a second radiation source, a second image capturing base, a cassette housed in the second image capturing base and having a stimulable phosphor panel, and a second marker to be imaged together with the subject, the second marker being identical in shape to the first marker and being disposed on the second image capturing base, a distance from the first radiation detector to an image capturing surface of the first image capturing base and a distance from the stimulable phosphor panel to an image capturing surface of the second image capturing base are different from each other, and the image correcting device calculates an area ratio of a radiation image of the first marker in the first radiation image captured by the first image capturing apparatus to a radiation image of the second marker in the second radiation image captured by the second image capturing apparatus, and multiplies the second radiation image information by the calculated area ratio to correct the second radiation image of the subject such that the second radiation image of the subject has the same magnification as that of the first radiation image. a first image capturing apparatus for capturing a first radiation image of a subject by applying a radiation to the subject; a second image capturing apparatus for capturing a second radiation image of the subject by applying a radiation to the subject, the second image capturing apparatus having a specification different from that of the first image capturing apparatus; an image correcting device for correcting the second radiation image of the subject such that the second radiation image of the subject has the same magnification as the first radiation image of the subject; and a display unit for displaying the corrected radiation image, characterized in that the first image capturing apparatus has a first radiation source, a first image capturing base, a first radiation detector housed in the first image capturing base, and a first marker to be imaged together with the subject, the first marker being disposed on the first image capturing base, the second image capturing apparatus has a second radiation source, a second image capturing base, a cassette housed in the second image capturing base and having a stimulable phosphor panel, and a second marker to be imaged together with the subject, the second marker being identical in shape to the first marker and being disposed on the second image capturing base, a distance from the first radiation detector to an image capturing surface of the first image capturing base and a distance from the stimulable phosphor panel to an image capturing surface of the second image capturing base are different from each other, and the image correcting device calculates an area ratio of a radiation image of the first marker in the first radiation image captured by the first image capturing apparatus to a radiation image of the second marker in the second radiation image captured by the second image capturing apparatus, and multiplies the second radiation image information by the calculated area ratio to correct the second radiation image of the subject such that the second radiation image of the subject has the same magnification as that of the first radiation image.