A radiation imaging apparatus is provided that includes: a radiation detection unit arranged to detect radiation； a generation unit configured to generate a radiation image based on the detected radiation； a storage configured to store a plurality of radiation images； a detection unit configured to detect one of a failure in and impossibility of one of taking of the radiation image and storing of the radiation image in the storage； and a communication unit configured to establish communication with an external apparatus when one of the failure and the impossibility is detected.
