PROBLEM TO BE SOLVED: To provide a particle ray radiation device capable of radiation to an object to be radiated by selectively switching between a broad beam method and a spot scanning method.SOLUTION: In a particle ray radiation device, a radiation device for radiating incident particle ray is disposed in a rotation frame where it is rotatably driven with a radiation reference point as a rotational center, the radiation device selects a broad beam method to radiate a part of an object to be radiated, and selects a spot scanning method to radiate other portion of the object to be radiated.