Provided is a radiation imaging apparatus including: a radiation detector configured to generate a first radiographic image and a second radiographic image based on a radiation a scattered radiation reduction unit configured to reduce a scattered radiation component from the first radiographic image and the second radiographic image a position alignment unit configured to perform position alignment on the first radiographic image and the second radiographic image, using the first radiographic image and the second radiographic image from which the scattered radiation component has been reduced and a combining unit configured to combine the first radiographic image and the second radiographic image that have been subjected to the position alignment.
