An organic electroluminescence device including a first electrode; a hole transport region on the first electrode; a light emitting layer on the hole transport region; an electron transport region on the light emitting layer; and a second electrode on the electron transport region, wherein the light emitting layer includes a first compound satisfying Formula 1 below and a second compound satisfying Formula 2 below, and the first compound has a full width at half maximum of 60 nm or less: V2>V1  [Formula 1] K1>1.1×K2.  [Formula 2]