PURPOSE: An ozone on-line injector is provided to feed a proper concentration of ozone to a place requiring the ozone and deplete the surplus ozone from an ozone generator with an ozone depleting apparatus, thereby forestalling contamination due to the surplus ozone. CONSTITUTION: An ozone on-line injector includes a distributor(40) distributing ozone from an ozone generator(10), an on-line mixer(60) connected to the distributor through a pipe(41), an ozone depleting apparatus(50), and a gas-liquid separator(70). Ozone is fed to the on-line mixer through the pipe, and is dissolved in water fed through a water supply pipe(57), so that an ozonized water is generated in the mixer. The ozone depleting apparatus converts the surplus ozone besides the ozone fed from the distributor to the on-line mixer into oxygen, and emits the oxygen into air. The gas-liquid separator is fed with the ozonized water from the on-line mixer through the pipe, and then separates impurities from the ozonized water. The on-line mixer has a stirrer for stirring the ozone and the water well. The on-line mixer is placed inside the pipe. A heater inside the gas-liquid separator heats the gas-liquid separator in order to separate the impurities from the ozonized water. [Reference numerals] (AA) Injection gas port；본 발명은 오존 온라인 인젝터에 관한 것이다. 더욱 상세하게는, 사용 용도에 따라서, 일정한 농도의 오존화된 물을 공급하고, 과잉의 오존은 오존 파괴기에서 처리하여 과잉 오존에 의한 오염을 방지하고, 적정 농도의 오존을 공급할 수 있도록 제작된 오존 온라인 인젝터를 제공하는 것이다.
