When a thin film transistor has an LDD structure or a double gate structure, the number of manufacturing steps increases, which may decrease the yield. The invention provides a display device where the influence of off current is reduced by a method different from the conventional one. According to the invention, a pass element is provided at one electrode of a light emitting element so as not to flow the off current of a transistor for driving the light emitting element through the light emitting element in a non-lighting period. The pass element allows the off current to flow outside, that is, the off current can be bypassed outside through the pass element.