An electro-optical device includes a display unit that has a plurality of switching elements provided at intersections of a plurality of scanning lines and a plurality of data lines and that drives the plurality of switching elements based on image signals supplied to the plurality of data lines so as to display images, a driving unit that controls driving of the display unit through a phase expansion so as to drive the plurality of switching elements for predetermined blocks, m.times.n signal wiring lines that transmit image signals, the image signals being divided into m (where m is a natural number of 2 or more) parallel data sequences and each of the data sequences including n (where n is a natural number of m or less) image signals, and that have extended portions such that the m.times.n signal wiring lines are grouped into a plurality of groups of signal wiring lines, each of the groups including n signal wiring lines for each data sequence on a substrate, and such that the plurality of groups of signal wiring lines for each data sequence are grouped, and a shield line that is formed between two adjacent groups of signal wiring lines for each data sequence along the signal wiring lines in a portion where the signal wiring lines extend.