A treatment planning apparatus includes: a data overally-managing unit, saving a target irradiation amount distribution to be irradiated on an object a broad irradiation parameter calculation unit, calculating operation parameters for each machine of irradiation nozzle and accelerator during broad irradiation and scanning irradiation parameter calculation unit, calculating operation parameters for each machine of the irradiation nozzle and the accelerator during scanning irradiation the broad irradiation parameter calculation unit and the scanning irradiation parameter calculation unit are cooperated with each other and calculate and obtain the operation parameters for each machine of the irradiation nozzle and the accelerator during the broad irradiation and the operation parameters for each machine of the irradiation nozzle and the accelerator during the scanning irradiation such that the sum of the irradiation amount of both of the broad irradiation and the scanning irradiation forms the target irradiation amount distribution.治療計畫裝置包括:資料統轄管理部,係保存應對照射對象照射之目標照射線量分布;寬照射參數演算部,係演算寬照射時之加速器及照射噴嘴的各機器的動作參數;以及掃描照射參數演算部,係演算掃描照射時之加速器及照射噴嘴的各機器的動作參數;寬照射參數演算部及掃描照射參數演算部係互相協作而以寬照射及掃描照射雙方的照射線量之合計會形成目標照射線量分布之方式,來演算並求出寬照射時之加速器及照射噴嘴的各機器的動作參數、以及掃描照射時之加速器及照射噴嘴的各機器的動作參數。10‧‧‧治療計畫裝置11‧‧‧資料統轄管理部12‧‧‧寬照射參數演算部13‧‧‧掃描照射參數演算部14‧‧‧機器統轄管理裝置20‧‧‧照射噴嘴30‧‧‧加速器31‧‧‧粒子線輸送系統40‧‧‧患者41‧‧‧散射體PB‧‧‧粒子線
