Provided is a light-emitting device in which a voltage drop is suppressed and light extraction efficiency is increased. Provided is a light-emitting device with increased productivity. Provided is a light-emitting device with high reliability. An extremely thin conductive film from 3 nm to 50 nm is used as an electrode on a light-emitting side and an auxiliary wiring is provided in contact with the electrode. When the width of the auxiliary wiring is 100 μm or less, the auxiliary wiring is hardly perceived with the naked eye, so that a light-emitting device in which light extraction efficiency is increased and luminance is obtained uniformly. The extremely thin auxiliary wiring can be formed by nanoimprinting technology. With use of nanoimprinting technology, the width of the auxiliary wiring can be reduced to 10 nm or less.