To provide an easily-manufacturable plasma device, and a method of its application.SOLUTION: A cell activation method for activating cells by irradiating plasma has an irradiation step, for supplying plasma generation gas between facing electrodes as much as 0.1 L or more and 5.0 L or less per minute, applying a voltage having a frequency of 0.5 kHz or more and less than 20 kHz to the plasma generation gas as much as 5.0 kVpps or more and less than 20 kVpps, and irradiating the cells with plasma. The irradiation step is performed twice or more at a prescribed interval.SELECTED DRAWING: Figure 1【課題】製造が簡便なプラズマ装置、及びその使用方法。【解決手段】プラズマを照射して細胞を賦活化する、細胞賦活化方法であって、対向する電極間に、プラズマ発生ガスを毎分０．１Ｌ以上５．０Ｌ以下で供給し、前記プラズマ発生ガスに周波数０．５ｋＨｚ以上２０ｋＨｚ未満の電圧を５．０ｋＶｐｓｓ以上２０ｋＶｐｐｓ未満で印加して、前記プラズマを前記細胞に照射する照射工程を有し、前記照射工程を所定の期間を空けて２回以上行うことよりなる。【選択図】図１
