Provided is a particle beam therapy system including a particle beam generating device (30) for generating particle beam to be irradiated to an irradiated object which is an affected area of a patient, and an X-ray photographing device (50) for irradiating X-ray to the irradiated object and photographing an X-ray image, wherein the particle beam therapy system has a therapy beam irradiation-permitted period during which the particle beam is permitted to be irradiated to the irradiated object, and a therapy beam irradiation-forbidden period during which the particle beam is forbidden to be irradiated to the irradiated object, and the X-ray photographing device (50) sets the photographing frame rate of X-ray image of the irradiated object during a X-ray photographing period which is the period containing at least one part of the therapy beam irradiation-permitted period as a first frame rate, and sets the photographing frame rate during the period other than the X-ray photographing period to be lower than the first frame rate.一種粒子線治療系統,係具備:粒子線產生裝置(30),產生照射至屬於照射對象之患者的患部的粒子線;及X線攝像裝置(50),將X線照射至照射對象而進行X線圖像的攝像;該粒子線治療系統係具有:可將粒子線射出至照射對象的治療射束可射出期間;及無法將粒子線射出至照射對象的治療射束無法射出期間;X線攝像裝置(50)係在屬於包含治療射束可射出期間之至少一部分的期間的X線攝像期間,將照射對象的X線圖像的攝像訊框率設為第一訊框率,而在X線攝像期間以外的期間,使攝像訊框率較前述第一訊框率更為降低。1‧‧‧加速器2、2a‧‧‧粒子線3‧‧‧真空導管4‧‧‧照射頭6‧‧‧患者10‧‧‧治療計劃裝置21‧‧‧機器控制裝置22‧‧‧X線攝像控制、圖像資訊取得裝置23‧‧‧圖像解析、臟器位置推定裝置30‧‧‧粒子線產生裝置50‧‧‧X線攝像裝置51a、51b‧‧‧X線管52a、52b‧‧‧平板檢測器60‧‧‧患部
