1. A dynamic image capturing control apparatus connected to a capturing apparatus in which dynamic capturing is performed by successively emitting radiation on a capturing body part a plurality of times to obtain a plurality of frame images showing a dynamic state of the capturing body part, the dynamic image capturing control apparatus comprising: an operation section to specify the capturing body part which is to be a capturing object; a capturing control section to set in the capturing apparatus a capturing condition including emission radiation amount and frame rate used in the dynamic capturing according to the capturing body part specified by the operation section to perform the dynamic capturing to obtain a plurality of frame images showing the dynamic state of the capturing body part; an index value calculation section to analyze at least one frame image obtained by the capturing device before the actual dynamic capturing to calculate an index value showing image quality; an upper limit frame rate calculation section to calculate an upper limit of the frame rate so that the index value showing image quality of the each frame image obtained by the actual dynamic capturing is no more than a predetermined standard value based on the calculated index value showing the image quality, wherein the capturing control section determines the frame rate to be used in the actual dynamic capturing based on the calculated upper limit frame rate and allows the capturing apparatus to perform the actual dynamic capturing at the determined frame rate.