To provide a mist sauna apparatus capable of efficiently converting the hot water supplied to a plurality of mist plates from a hot water supply means to micromist.

In a mist sauna apparatus 10A provided with a hot water supply means 11 for supplying hot water, a plurality of mist plates 12 receiving the supply of hot water from the hot water supply means 11 and a hot air generation means 4 for sending hot air toward the mist plates 12 to discharge micromist to a bathroom, the plurality of the mist plates 12 are obliquely arranged so that the end parts 12a on the side of the hot air generation means 4 of the mist plates 12 becomes lower than the end parts 12b on the side opposite to the hot air generation means 4 of the mist plates 12 and ultra hydrophilic coating is applied at least to the surfaces receiving the supply of hot water of the mist plates 12.