The present invention provides a light emitting device typified by a laser oscillator using an electroluminescent material that can enhance directivity of emitted laser light and resistance to a physical impact. A light emitting device includes a first electrode having a convex portion or a concave portion, an electroluminescent layer formed over the first electrode to overlap the convex portion or the concave portion, and a second electrode having a convex portion or a concave portion formed over the electroluminescent layer to overlap the convex portion or the concave portion. In the light emitting device, the first electrode has a curved surface in the convex portion or the concave portion, a center of a curvature of the curved surface is located on an opposite side of the second electrode, and laser light is emitted by oscillating light generated in the electroluminescent layer between the first electrode and the second electrode.