According to the method of manufacturing an optical matrix device of this invention, lyophobic portions which are lyophobic, and lyophilic portions which are lyophilic, with respect to metal ink are formed alternately and parallel, and with a pitch smaller than a width of droplets applied by printing technique, on a foundation of wires to be formed on a substrate. Thus, the ejected droplets extend along edges of the lyophobic portions, while straddling the plurality of lyophobic portions, thereby to improve the accuracy of wire formation. This can form a uniform wire width, and eliminate a possibility of a formed wire making a short circuit with an adjacent wire.