A light-emitting device with high heat resistance in a manufacturing process is to be provided. The light-emitting device includes a second electrode over a first electrode with an EL layer sandwiched therebetween; the EL layer includes at least a light-emitting layer, a first electron-transport layer, a second electron-transport layer, and an electron-injection layer; the first electron-transport layer is over the light-emitting layer; the second electron-transport layer is over the first electron-transport layer; the light-emitting device includes an insulating layer in contact with a side surface of the light-emitting layer, a side surface of the first electron-transport layer, and a side surface of the second electron-transport layer; the electron-injection layer is over the second electron-transport layer; the insulating layer is positioned between the electron-injection layer and the side surface of the light-emitting layer, the side surface of the first electron-transport layer, and the side surface of the second electron-transport layer; and the second electron-transport layer contains a heteroaromatic compound including at least one heteroaromatic ring and an organic compound different from the heteroaromatic compound.