<;P>;PROBLEM TO BE SOLVED: To provide an antibacterial-antifungal agent that is excellent in both antibacterial and antifungal properties and shows high durability and processibility. <;P>;SOLUTION: The antibacterial-antifungal agent comprises a tetranuclear complex of Zn-Ag-Zn-Ag represented by Formula (1) (wherein R<;SP>;1<;/SP>;-R<;SP>;8<;/SP>;are identical to or different from each other and are each H or 1-6C alkyl group; and A<;SP>;1<;/SP>;-A<;SP>;4<;/SP>;are identical to or different from each other and are each 1-6C alkylene group). <;P>;COPYRIGHT: (C)2011,JPO&INPIT