A radiation imaging apparatus that performs radiation imaging of a breast of a subject, which includes a table for laying down the subject; a receiving section that receives a breast of the subject laid on the table in a supine position; a radiation imaging section including a radiation emission unit and a radiation detection unit each located at a position opposing to each other being interposed by the breast of the subject received in the receiving section; and a drive unit that shifts the receiving section to a position suitable for imaging the breast of the subject.