A particle beam transmitting section (5) includes: a horizontal biasing electromagnet (501, 502, 503) causing a particle beam to be biased toward a direction parallel to a median plane of a circular accelerator (12) a first vertical biasing electromagnet (551) causing the particle beam, the moving direction of which has been bended by the horizontal biasing electromagnet, to be biased toward a direction that is different from the direction parallel to the median plane of the circular accelerator and a second vertical biasing electromagnet (552) causing the moving direction of the particle beam, the moving direction of which has been bended by the first vertical biasing electromagnet, to be bended such that the particle beam moves parallel to the median plane of the accelerator wherein the horizontal biasing electromagnet is provided on a floor different from the floor having a particle-radiation irradiated section (15) provided thereon.粒子線輸送部(5)係包括:水平偏向電磁鐵(501、502、503),使粒子線往平行於圓形加速器(12)的加速器中間面之方向偏向;第1垂直偏向電磁鐵(551),使由該水平偏向電磁鐵而彎曲其行進方向後之粒子線,往與平行於加速器中間面之方向不同之方向偏向;以及第2垂直偏向電磁鐵(552),係使由該第1垂直偏向電磁鐵而彎曲其行進方向後之粒子線的行進方向彎曲,以使該粒子線往平行於加速器中間面之方向行進;且將水平偏向電磁鐵設置於與設置有粒子線照射部(15)之樓層不同之樓層。5‧‧‧高能量粒子線輸送部10‧‧‧射入器11‧‧‧低能量粒子線輸送部12‧‧‧圓形加速器15‧‧‧旋轉支架(粒子線照射部)20、21‧‧‧粒子線50‧‧‧水平偏向電磁鐵群501、502、503‧‧‧水平偏向電磁鐵552‧‧‧第2垂直偏向電磁鐵
