<;P>;PROBLEM TO BE SOLVED: To provide an antimicrobial agent which can keep an antibacterial performance, an antifungal performance, and a deodorizing performance without causing discoloration and the like over a long period of time. <;P>;SOLUTION: This antimicrobial agent comprises an antimicrobial inorganic oxide colloid solution prepared by adhering an antimicrobial metal component such as silver, copper, zinc or tin and an antimicrobial ingredient stabilizer such as ethylenediamine tetraacetic acid. <;P>;COPYRIGHT: (C)2008,JPO&INPIT