The present invention provides a particle beam irradiation device, comprising: a scanning electromagnet 2 rendering particle beam scan an irradiation object； a scanning information memorizing unit 4 for memorizing scanning position information at a plurality of scanning positions when the particle beam scans the irradiation object, and scanning sequence information in order to scan the plurality of scanning positions； and a scanning electromagnet control unit 8 for controlling the scanning electromagnet according to the scanning position information and scanning sequence information which are memorized in the scanning information memorizing unit； wherein the scanning position information memorized in the scanning information memorizing unit includes a portion where the adjacent sequence of the scanning position information become the same scanning position information.一種粒子線照射裝置，具備：掃描電磁鐵2，用以使粒子線掃描照射對象；掃描資訊記憶部4，用以記憶關於粒子線掃描照射對象時之複數個掃描位置的掃描位置資訊、及屬於掃描複數個掃描位置之順序的掃描順序資訊；及掃描電磁鐵控制部8，根據記憶於該掃描資訊記憶部的掃描位置資訊與掃描順序資訊來控制掃描電磁鐵；記憶於掃描資訊記憶部的掃描位置資訊，係包含相鄰之順序的掃描位置資訊成為相同掃描位置資訊的部分。
