Provided is a radiation imaging apparatus, which is configured to acquire radiation exposure image data and non-radiation exposure image data, including: a setting unit configured to set at least one of an order or a frequency of generating offset correction data in association with imaging modes； a correction data generation unit configured to generate the offset correction data associated with each of the imaging modes from the non-radiation exposure image data in the set order or at the set frequency； and an image processing unit configured to correct, with use of the offset correction data, image data that is acquired by imaging a subject.
