A dynamic radiographic imaging system 100 includes a detecting section 110 that detects periodic changes of a predetermined site of a subject； a recommended imaging (start) timing specifying section 120 that specifies a recommended imaging start timing based on the detection result； a notifying section 240 that makes a notification to a photographer in multiple stages as the recommended imaging start timing approaches； an operation unit 23 that receives an instruction input from the photographer to start radiation imaging of the subject； and an image capturing control section 140 that controls the radiation imaging in response to the instruction input by the operation unit 23. The dynamic radiographic imaging thus can be performed at an appropriate imaging timing without depending on the level of skill of the photographer for the body site that periodically changes such as the heart.
