A particle beam irradiation apparatus including: a scanning unit configured to scan a particle beam an electric current supply unit configured to supply an electric current to the scanning unit and a scanning control unit configured to control the scanning unit by sending an electric current command value to the electric current supply unit, wherein a period of an operation clock of the scanning control unit and a period of an operation clock of the electric current supply unit are the same.本發明提供一種帶電粒子射線治療裝置(1),其以進行高精確度之粒子射線的掃描控制為目的,向患者(50)的腫瘤(51)照射帶電粒子射線(R),且具備:掃描電磁鐵(6),掃描帶電粒子射線(R);掃描儀電源(7),向掃描電磁鐵(6)供給電流;及掃描控制器(10),藉由向掃描儀電源(7)發送電流指令值來控制基於掃描電磁鐵(6)之帶電粒子射線(R)的掃描,掃描控制器(10)的動作時序的週期與掃描儀電源(7)的動作時序的週期相等。1‧‧‧帶電粒子射線治療裝置(粒子射線照射裝置)2‧‧‧加速器3‧‧‧傳輸線4‧‧‧照射部5‧‧‧位置測定監控器(位置測定手段)6‧‧‧掃描電磁鐵(掃描手段)6A‧‧‧第1掃描電磁鐵6B‧‧‧第2掃描電磁鐵7‧‧‧掃描儀電源(電流供給手段)7A‧‧‧第1電源(X電源)7B‧‧‧第2電源(Y電源)8‧‧‧治療計劃部9‧‧‧照射控制部10‧‧‧掃描控制器(掃描控制手段)11‧‧‧光束控制部50‧‧‧患者51‧‧‧腫瘤(被照射體)100‧‧‧治療台A‧‧‧進行方向R‧‧‧帶電粒子射線
