PROBLEM TO BE SOLVED: To attempt the miniaturization of a charged particle irradiation device by arranging a transport line in the rear side of an irradiation chamber in the charged particle beam irradiation device that includes a detector that detects the gamma rays generated in a body to be irradiated.SOLUTION: The charged particle beam irradiation device 10 that includes an irradiation chamber 21 having a charged particle beam irradiation part 11 rotatable around the irradiated body to which a charged particle beam is irradiated, includes: a detector 91 detecting gamma rays generated in the irradiated body and a support mechanism 92 that supports the detector 91 and can integrally rotate with the charged particle beam irradiation part 11, and in which the detector 91 is able to move in the irradiation chamber 21, wherein the support mechanism 92 is configured such that the detector is made to move in the diameter direction in the rotation track of the charged particle beam irradiation part 11.COPYRIGHT: (C)2013,JPO&INPIT【課題】被照射体内で発生したガンマ線を検出する検出器を備えた荷電粒子線照射装置において、輸送ラインを照射室の背面側に配置して、荷電粒子照射装置の小型化を図ること。【解決手段】荷電粒子線が照射される被照射体の回りに回転可能な荷電粒子線照射部11を有する照射室21を備えた荷電粒子線照射装置10において、被照射体内にて発生したガンマ線を検出する検出する検出部91と、検出部91を支持しながら荷電粒子線照射部11と一体的に回転移動可能であると共に、照射室21内で検出部91を移動可能とする支持機構92と、を備え、支持機構92は、荷電粒子線照射部11の回転軌道における径方向に検出部11を進退させる構成とする。【選択図】図5
