Provided is a radiation imaging apparatus including: an image acquiring unit configured to acquire a first radiation image, which is photographed by irradiating an object with radiation under a state in which a subject is not in an imaging range, and a second radiation image, which is photographed by radiating radiation under a state in which the subject and the object are in the imaging range； and an image processing unit configured to perform correction for deleting image information on the object from the second radiation image by using the first radiation image.
