Provided is a new-type coronavirus (SARS-COV-2) inactivating agent using trees that are thinned and split. A new-type coronavirus (SARS-COV-2) inactivating agent comprising a compressed liquid, an extract or a distilate of a woody part and/or leaf of a tree as an active ingredient. Preferably, the tree is selected from the group consisting of hinokii of the family hinokii, Cryptomeria of the family hinokii, A new-type coronavirus (SARS-COV-2) inactivating agent, which is a tree selected from the group consisting of Eucalyptus of the family Fucalyaceae, Eucalyptus of the family Fucalylaceae, and Asna of the family Fucalylaceae. Figure 1

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