[Problems to be Solved] In a case where a radiological imaging for a subject is performed continuously, obtaining a radiation exposure dose for each region of the subject. [Means for Solving the Problems] In a case where a radiation exposure dose of a subject is obtained in a radiation exposure dose obtaining apparatus (40) based on a radiation image signal of each frame detected by a radiation image detector (12) by continuously performing radiological imaging of the subject due to the continuous radiological imaging, an area corresponding to a region of the subject is set in an image represented by the radiation image signal and a radiation exposure dose is obtained for each set area.
