An electro-optical device is provided with a data line which are provided in a pixel region, a pixel electrode formed from a transparent conductive material which is upper layer than the data line, a storage capacitance electrode which is provided in a layer between the pixel electrode and the data line so as to face the pixel electrode via a capacitance insulation film, an additional capacitance which has a first capacitance electrode and a second capacitance electrode which is formed in the same layer as the pixel electrode and the storage capacitance electrode, respectively. The second capacitance electrode is electrically connected to the data line.