Disclosed is a light-emitting display having a plurality of pixels wherein each pixel comprises a light-emitting device (100) having a light-emitting element layer which is formed between a first electrode and a second electrode and contains at least a light-emitting layer. An insulating layer (30) is formed between the light-emitting device (100) and a surface of a first or second substrate on the viewing side of the display, and the insulating layer (30) is provided with recesses and projections in at least one or more pixel regions, thereby forming an optical path length adjusting portion (32). By forming such an optical path length adjusting portion (32) in a pixel region, there is an increase in the interference conditions for the light emitted from the light-emitting device (100) to the outside, thereby averaging the interference.