To provide an ozone washing system capable of increasing a washing effect by ozone without increasing an ozone generation amount and improving safety for a human body.

The ozone washing system is provided with an ozone mixer 13 for mixing washing water 5 and the ozone supplied from an ozone generator 2 and discharging them to a washing machine 1. Thus, by mixing the ozone with the washing water 5 by the ozone mixer 13, the ozone is supplied to the washing machine 1 in the bubble state of particles finer than the bubbles of the ozone formed by a conventional bubbler. Since the particles of the ozone are fine and the ozone and the washing water 5 are simultaneously brought into contact with an object 4 to be washed inside the washing machine 1 before the object 4 to be washed inside the washing machine 1 is immersed in the washing water 5, the ozone is easily passed through the fibers of the object 4 to be washed. Thus, the washing effect by the ozone is increased without increasing the ozone generation amount and the safety for the human body is also improved.