A support system of diagnostic dynamic-imaging aims to provide diagnostic support information to which the state of a blood stream associated with breathing is added. An arithmetic unit (4) of a dynamic-imaging system (100) divides each of a plurality of frame images of chest dynamic images captured by an imaging device (1) into a plurality of small regions, performs image analysis of each small region corresponding among the frame images, and carries out ventilation judgment processing which judges whether the state of ventilation in each small region is abnormal, blood stream judgment processing which judges whether the state of the blood stream in each small region is abnormal, and abnormality judgment processing which judges whether each small region is abnormal from the result of judgment obtained by the ventilation judgment processing and that obtained by the blood stream judgment processing. Then, a console (3) for diagnosis displays at least the result of judgment obtained by the abnormality judgment processing.