[Object] To provide an ozonized water producing apparatus capable of efficiently and easily producing ozonized water with a high dissolution degree and a high concentration. [Solution] In an ozonized water producing apparatus (201) constituted by including a pipeline (273) for passing water to be treated through, a gas-liquid mixing structure (205) provided halfway in the pipeline, and an ozone supply structure (203) for supplying ozone into the gas-liquid mixing structure, the gas-liquid mixing structure is provided with a magnet (243) for exerting a magnetic force onto an inside. By causing the magnetic force to act on both the water to be treated and ozone, ozonized water with a high dissolution degree and a high concentration can be efficiently and easily produced.
