To provide an ozone mist generator which can give a high concentration as required by controlling ozone concentration, and can perform moisturizing while increasing the effect of sterilization and deodorization by ozone.

An ozonizer S includes: a water storage tank 4; a device body 2 having an ultraviolet lamp 6 for ozonizing water in the storage tank 4; and a mist generator 12 for spraying ozonized water to form ozone mist. The water storage tank 4 includes: a storage chamber R for storing the ultraviolet lamp 6 inside and arranging the ultraviolet lamp 6 in a manner covering the periphery of the ultraviolet lamp 6 with water; a guiding path 10 for unifying ozonized air, which is formed by ozonization with the ultraviolet lamp 6 in the storage chamber R, with ozone mist; a discharging port 2a for discharging the ozone mist; and further a detachable sensor 8 which can be attached and detached to and from the device body 2 and with which the device body 2 can detect the attachment and the detachment of the storage tank 4.