PROBLEM TO BE SOLVED: To provide a charged particle beam therapy apparatus capable of raising the symmetry of a beam diameter of charged particle beams in an isocenter position.SOLUTION: A charged particle beam therapy apparatus 1 according to the present invention comprises: an accelerator 2 for accelerating charged particles and emitting charged particle beams an irradiation nozzle 18 for projecting the charged particle beams a gantry 4 rotatable or oscillatable around a predetermined rotation axis P an accelerator-side beam transport line 3 which is connected to the accelerator 2 and transports the charged particle beams emitted by the accelerator 2 to the gantry 4 a gantry-side beam transport line 20 which is provided on the gantry 4 and transports the charged particle beams, transported by the accelerator-side beam transport line 3, to the irradiation nozzle 18 and a collimator 32 which is provided at a gantry 4-side tip of the accelerator-side beam transport line 3 and which straightens the beam shape of the charged particle beams.COPYRIGHT: (C)2014,JPO&INPIT【課題】 アイソセンター位置における荷電粒子線のビーム径の対称性を高めることができる荷電粒子線治療装置を提供する。【解決手段】本発明に係る荷電粒子線治療装置1は、荷電粒子を加速して荷電粒子線を出射する加速器2と、荷電粒子線を照射する照射ノズル18を有し、所定の回転軸線Pを中心に回転又は揺動が可能なガントリー4と、加速器2に接続され、加速器2が出射した荷電粒子線をガントリー4へ輸送する加速器側ビーム輸送ライン3と、ガントリー4に設けられ、加速器側ビーム輸送ライン3の輸送した荷電粒子線を照射ノズル18へ輸送するガントリー側ビーム輸送ライン20と、加速器側ビーム輸送ライン3のガントリー4側の端部に設けられ、荷電粒子線のビーム形状を整えるコリメータ32と、を備える。【選択図】図6
