A radiation image processing apparatus includes a display and a hardware processor. The display displays an image. The hardware processor is configured to perform the following, acquire radiographic moving image data comprising a plurality of frame images, subject the moving image data to predetermined analytical processing, generate an analyzed moving image comprising a plurality of analyzed frame images, select a plurality of specific analyzed frame images from the analyzed frame images of the analyzed moving image, derive a calculation signal value based on signal values of pixels having common coordinates positioned in common coordinates in the selected specific analyzed frame images, and cause a calculated image based on the calculation signal values generated according to coordinates to appear on the display.
