PROBLEM TO BE SOLVED: To provide a processing device using ozone capable of efficiently introducing ozone by suppressing adhesion of an object to be treated to an introduction part for introducing ozone into a treatment tank. SOLUTION: This processing apparatus using ozone is a processing tank 2 in which an object to be processed and a liquid having a specific gravity larger than that of the object to be processed and which is phase-separated from the object to be processed, and an object to be processed in the processing tank 2 are contained. The air diffuser 5 is arranged at a position where a liquid phase-separated from the processed material is accommodated, and includes a diffusing pipe 5 for introducing ozone into the processing tank 2, and a heating tank 3 for adjusting the processing tank 2 to a temperature equal to or higher than the melting point of the object to be processed. . [Selection diagram] Figure 1【課題】オゾンを処理槽に導入する導入部に被処理物が付着することを抑制して、オゾンを効率よく導入することが可能なオゾンを用いた処理装置を提供する。【解決手段】このオゾンを用いた処理装置は、被処理物と、被処理物よりも比重が大きいとともに被処理物と相分離する液体とが収容される処理槽２と、処理槽２の被処理物と相分離する液体が収容される位置に配置され、処理槽２にオゾンを導入する散気管５と、処理槽２を被処理物の融点以上の温度に調整する加熱槽３とを備える。【選択図】図１
