A manufacturing method of antenna capable of miniaturizing device having antenna is provided to facilitate manufacture by performing immersion silver plating after forming antenna pattern for plating. An antenna base is manufactured(10). The antenna base is cleaned(11). An antenna pattern of metal material is formed on a surface of the antenna base(20). The antenna base having the antenna pattern is cleaned(21). A silver plating layer is formed on the antenna pattern(30) by plating the antenna base having the antenna pattern in immersion silver plating solution(23). The antenna base having the silver plating layer is cleaned(31).
