A radiation imaging system including an imager that performs imaging of moving images by irradiating a subject with radiation, the radiation imaging system includinga storage in which an imaging guide pattern for instructing a predetermined motion to the subject at a time of imaging by the imager is associated with a predetermined word that can be included in an imaging order and is stored,a hardware processor that acquires an imaging order to imaging by the imager, extracts the predetermined word from the acquired imaging order, and selects an imaging guide pattern that is associated with the extracted predetermined word from imaging guide patterns stored in the storage, andan instructor that instructs the predetermined motion to the subject, based on the selected imaging guide pattern.
