A high frequency control device of this invention includes a hard disk drive memory (31) storing high frequency pattern data of high frequency to be applied for every combination of energy and intensity of particle ray to be generated, and a local memory (32) having a higher reading speed than the hard disk drive, which reads and stores a plurality of pattern data of high frequency for every patient from the hard disk drive memory (31) together with the changing sequence of the energy and the intensity, for performing a scanning irradiation method for sequentially forming layered-shape particle ray irradiation areas in a depth direction of a disease site of the patient by irradiating the particle ray to the disease site of the patient who is the irradiating object with the energy and the intensity of the particle ray being sequentially changed.本發明提供一種加速器的高頻控制裝置，係具備：硬式磁碟機記憶體(31)，用以記憶要產生之粒子線之能量與強度之每一組合之要施加的高頻的模式資料；及區域記憶體，為資料之讀取速度較硬式磁碟機還快者，其係為了執行依序變更粒子線的能量與強度而對屬於照射對象之患者的患部照射粒子線，以在患者之患部的深度方向依序形成層狀粒子線照射區域的掃描式照射法，而從硬式磁碟機記憶體(31)依每一患者將高頻的複數個模式資料，隨同改變能量與強度的順序一同讀入並記憶。
