PROBLEM TO BE SOLVED: To enhance humidity detection accuracy and control humidity with good responsiveness in a mist sauna apparatus which makes the inside of a bathroom a sauna space.SOLUTION: A mist sauna apparatus is configured to have: bathroom relative humidity detection means 114 which detects relative humidity in a bathroom bathroom humidity trend determination means 3 which determines if the relative humidity is in an upward direction, in a downward direction, or in an equilibrium according to a drive state of the mist sauna apparatus and bathroom relative humidity correction means 4 which corrects the relative humidity detected by the bathroom relative humidity detection means 114 when the relative humidity is determined to be in an upward direction or in a downward direction. With the configuration, the mist sauna apparatus can detect the relative humidity accurately and control the humidity with good responsiveness.COPYRIGHT: (C)2014,JPO&INPIT【課題】浴室内をサウナ空間とするミストサウナ装置において、湿度の検知精度を高め、応答性のよい湿度制御を行う。【解決手段】ミストサウナ装置において、浴室の相対湿度を検知する浴室相対湿度検知手段114と、相対湿度がミストサウナ装置の駆動状態により上昇方向か、下降方向か、平衡状態か判定を行う浴室湿度傾向判定手段3と、上昇方向または下降方向と判定した場合に浴室相対湿度検知手段114により検知した相対湿度に補正を行う浴室相対湿度補正手段4を備えたという構成にしたことにより、相対湿度を精度よく検知でき、応答性のよい湿度制御が可能なミストサウナ装置を得られる。【選択図】図2