A radiation image capturing apparatus maintains previous image capturing position data stored in an image capturing position data storage unit 15 of a control unit 13 when a setting of a reference position of a long-length imaging region and the number of images to be captured are not changed. On the other hand, the radiation image capturing apparatus clears the previous image capturing position data stored in the image capturing position data storage unit 15 of the control unit 13 when either a setting of a reference position of a long-length imaging region or the number of images to be captured is changed. Then, the control unit 13 temporarily prohibits X-ray image capturing, and a warning display unit 16 causes a display unit 11 to display a display prompting input of image capturing position data for subsequent long-length image capturing. This display is kept displayed until an operator inputs image capturing position data for subsequent long-length image capturing. When an operator inputs image capturing position data for the subsequent long-length image capturing and the data is stored in the image capturing position data storage unit 15 of the control unit 13, the control unit 13 releases the prohibition of image capturing.
