Provided are a light-emitting device and a display apparatus. The light-emitting device includes: a reflective layer including a plurality of nano-structures that are two-dimensionally arranged in a regular periodic structure; a first electrode disposed on the plurality of nano-structures of the reflective layer; an organic emission layer disposed on the first electrode; and a second electrode disposed on the organic emission layer. An interval between adjacent nano-structures in a central portion of the reflective layer or an interval between adjacent nano-structures in a peripheral portion surrounding the central portion of the reflective layer is equal to or less than 70 nm.