An object is to efficiently remove bacteria. A disinfection method according to an embodiment of the present disclosure is a disinfection method for spraying a chemical mist 102 containing a chemical solution from a spray unit 110 onto an object 104 to sterilize the object 104. Then, during the first period, the chemical mist 102 in which the mist amount per unit time of the chemical mist 102 is the first mist amount, which is performed by the control circuit 130 that controls the spraying of the spraying unit 110, is sprayed onto the object 104. During the first step of performing the control and during the second period after the first period, the chemical mist 102 having the second mist amount smaller than the first mist amount per unit time is sprayed on the object 104. During the second step of performing the control and the third period after the second period, the chemical mist 102 having the third mist amount larger than the second mist amount per unit time is sprayed on the object 104. Take control And a third step. [Selection] FIG. 3A【課題】対象物の除菌を効率良く行う。【解決手段】本開示の一態様に係る除菌方法は、噴霧部１１０から薬液を含む薬液ミスト１０２を対象物１０４に噴霧して、対象物１０４の除菌を行うための除菌方法であって、噴霧部１１０の噴霧を制御する制御回路１３０によって行われる、第１期間中、薬液ミスト１０２の単位時間当たりのミスト量が第１のミスト量である薬液ミスト１０２を対象物１０４に噴霧する制御を行う第１ステップと、第１期間の後の第２期間中、単位時間当たりのミスト量が第１のミスト量より少ない第２のミスト量である薬液ミスト１０２を対象物１０４に噴霧する制御を行う第２ステップと、第２期間の後の第３期間中、単位時間当たりのミスト量が第２のミスト量より多い第３のミスト量である薬液ミスト１０２を対象物１０４に噴霧する制御を行う第３ステップと、を含む。【選択図】図３Ａ
