A driving method of an electro-optic device is capable of sufficiently providing a threshold voltage compensation time of a driving transistor and a data writing time. A driving method of an electro-optic device including a first power source, a second power source, data lines, scan lines, signal lines, and pixel circuits, includes: a first step in which a light emitting element is in a non-light-emitting state, and a second transistor is turned on by a change of a pulse applied to a signal line; and a second step in which the scan line is sequentially and exclusively selected after the second transistor is turned on, a third transistor including a gate connected to a selected scan line is turned on, and a corresponding data voltage is written to a first node from the data line through the third transistor.