This invention provides a particle beam therapy device that does not require a separate certification for operation safety of irradiation dose monitor and an additional failure diagnosis function. The particle beam therapy device (100) switches the principle and subordinate role of two irradiation dose monitors (50, 51) by a irradiation dose monitor system control device (54) to control corresponding irradiation dose monitor circuits (52, 53), so that the operation of the two irradiation dose monitors (50, 51) can be confirmed in the therapeutic flow without the need of a special operation.以提供一種粒子射線治療裝置為目的,該粒子射線治療裝置係無須為了檢測線量監視器的動作健全性而另外進行驗證,且無須追加之故障診斷功能。粒子射線治療裝置(100)係設為由線量監視器系統控制裝置(54)按每次照射切換2台線量監視器(50、51)之作用,而控制各自對應之線量監視器電路(52、53)之構成,藉此無須特別的操作,而能在治療流程中進行2台線量監視器(50、51)的動作確認。1‧‧‧加速器2‧‧‧治療室3‧‧‧射束控制裝置4‧‧‧照射控制裝置5‧‧‧線量監視器系統10‧‧‧入射器11‧‧‧離子源12‧‧‧前段直線加速器13‧‧‧真空導管14至20、22a、22b、22c、22d‧‧‧電磁鐵21‧‧‧同步加速器23‧‧‧高頻加速空洞24‧‧‧射出裝置25至27‧‧‧偏向電磁鐵50、51‧‧‧線量監視器52、53‧‧‧線量監視器電路54‧‧‧線量監視器系統控制裝置100‧‧‧粒子射線治療裝置201‧‧‧患者202‧‧‧照射機器203‧‧‧患者台
