A radiographic imaging device comprising a short-focus radiation source which radiates radiant rays to an examined object, a member to hold the examined object, and a radiographic image detector which detects radiant rays passing through the examined object and reads radiographic image information therefrom in order to perform phase contrast photography on the object which is held by the holding member, wherein said detector is equipped with a phosphor plate which contains photostimulable phosphor particles having polyhedron crystal structures and the photostimulable phosphor occupies 60 to 80% of the photostimulable phosphor layer on the phosphor plate.