[en] We proposed the direct vitrification process of chloride waste by the micro-wave generated oxygen plasma and carried out experiments in order to investigate its possibilities. The newly designed experimental equipment consists of an electric furnace and a plasma generator. The glass sample mixed with chloride sample in a ceramic crucible is melt in the electric furnace and irradiated by oxygen plasma. The characteristics of this plasma was measured by spectroscopic method and it was confirmed that it is the suitable atomic source because of the high oxygen atom concentration of 10¹⁷-10¹⁸ cm^-3, instead of the low electron density of 10¹² cm ^-3. In the experiments of vitrification and evaluation, it was recognized that the metal elements are confined in the vitrified solid and it was found that there exists the plasma irradiation effects, namely the chloride removal and the metal elements enclosing due to the dissolution of a large amount of oxygen. The modeling calculation assuming the physical dissolution and the diffusion was carried out and it was concluded that the dissolution of such a large amount of oxygen cannot be explained by such a model and it can be caused by the dissolution of oxygen atoms in the plasma. This research work have prepared basic data for the direct vitrification process of chloride waste and obtained the important information, the research subjects to be solved for the process evaluation. (author)