An electro-optical device includes a plurality of data lines, a plurality of scan lines, and a plurality of unit circuits disposed to correspond to respective intersections of the plurality of data lines and the plurality of scan lines, where each of the plurality of data lines is supplied with a data potential corresponding to a level of gray scale and each of the plurality of scan lines is supplied with a scan signal which defines a writing period that it takes the data potential to be loaded into the corresponding unit circuit, in which each of the plurality of unit circuits includes a drive transistor for generating a driving current corresponding to a potential of a gate thereof, an electro-optical element displaying a level of gray scale corresponding to the driving current, a capacitive element having a first electrode and a second electrode, an electric supply line which is electrically connected to the second electrode in an initialization period other than the writing period and which is supplied with a predetermined potential, a first switching element for electrically connecting the gate and a drain of the drive transistor to each other during at least the initialization period, and a second switching element for controlling electrical connection and disconnection between the data line and the first electrode on the basis of the scan signal, where the second electrode is connected to the gate and the electric supply line extends in a direction so as not to intersect the scan line.