The present invention provides a neutron beam irradiation system that improves operation efficiency. The neutron beam irradiation system (1) comprises: a target (T), which is irradiated by a charged particle beam (P) to generate a neutron beam (N)； a receiving section (102), which comprises at least a deceleration body (108) and receives the target (T) therein； a converging section (104) that converges the neutron beam (N) that is irradiated to an object-to-be-irradiated； and a therapeutic platform (32), which carries the object-to-be-irradiated. Further, the neutron beam irradiation system (1) comprises rails (114), sliding sections (116), and driving sections (117) to serve as relative movement means. The relative movement means enables the therapeutic platform (32) to make a relative movement for approaching or leaving the target (T), the receiving section (102), and the converging section (104). As such, after the irradiation of the neutron beam (N), for example, the therapeutic platform (32) is moved away from the target (T), the receiving section (102), and the converging section (104) that become radiated so that doctors may approach the therapeutic platform (32) without being negatively affected by radiation.本發明是為了提供一種能夠提高作業效率之中子束照射系統。中子束照射系統(1)具備：靶(T)，被照射帶電粒子束(P)而產生中子束(N)；容納部(102)，至少包含減速體(108)且容納靶(T)；收斂部(104)，收斂照射至被照射體之中子束(N)；及治療台(32)，載置被照射體。再者，中子束照射系統(1)具備作為相對移動手段之導軌(114)、滑動部(116)及驅動部(117)，前述相對移動手段使治療台(32)以相對於靶(T)、容納部(102)及收斂部(104)靠近及離開的方式進行相對移動。藉此，例如在照射中子束(N)之後，使治療台(32)從放射化後之靶(T)、容納部(102)及收斂部(104)離開，藉此醫師等能夠靠近治療台(32)而不受放射化的不良影響。
