The objective is to obtain a particle ray irradiation device being capable of changing the combination of plural parameters regarding combinations for the irradiation field and irradiation location accuracy of particle ray irradiation, and being able to perform a wide selection of irradiation variation, wherein particle ray irradiation device (58) irradiates charged particle beam (3) accelerated by accelerator (54) upon irradiated subject (11), and comprises scanning electromagnets (1, 2) for scanning charged particle beam (3), and scanning electromagnet removing device (4) for removing scanning electromagnets (1, 2) so as to alter a distance between scanning electromagnets (1, 2) and irradiated subject (11) along a beam axial direction of charged particle beam (3).本發明提供一種粒子束照射裝置及粒子束治療裝置,目的為獲得一種粒子束照射裝置,係將照射場及照射位置精度的組合等的粒子束照射之複數個參數的組合設為可變,俾可進行各式各樣的照射變化之照射。本發明之粒子束照射裝置(58),係將藉由加速器(54)所加速的荷電粒子射束(3)照射於照射對象(11)者,具備有:掃描電磁鐵(1、2),用以掃描荷電粒子射束(3);以及掃描電磁鐵移動裝置(4),以變更在荷電粒子射束(3)的射束軸方向之掃描電磁鐵(1、2)與照射對象(11)的距離的方式移動掃描電磁鐵(1、2)。1...X方向掃描電磁鐵2...Y方向掃描電磁鐵3...荷電粒子射束4...掃描電磁鐵移動裝置5...劑量監視器6...劑量資料變換器7...掃描電磁鐵電源8...照射控制裝置9...位置監視器10...位置資料變換器11...照射對象12...馬達13...滾珠螺桿58...粒子束照射裝置
