In a radiographic image connection processing method of connecting plural partial radiographic images, the partial radiographic images are selected, and if appropriate the operation mode is changed, e.g., from an image position adjustment mode, for adjusting a position of the selected partial radiographic image, to an image measurement mode, for measuring the selected partial radiographic image, or vice versa. The selected partial radiographic images are connected. Thus, it is possible to achieve image position adjustment and image measurement during radiographic image connection, and it is also possible to achieve smooth performance of the operations for image position adjustment and image measurement.