A light-emitting element, a light-emitting element unit and a light-emitting element package are provided, which are each reduced in reflection loss and intra-film light absorption by suppressing multiple light reflection in a transparent electrode layer and hence have higher luminance. The light-emitting element 1 includes a substrate 2, an n-type nitride semiconductor layer 3, a light-emitting layer 4, a p-type nitride semiconductor layer 5, a transparent electrode layer 6 and a reflective electrode layer 7, and the transparent electrode layer 6 has a thickness T satisfying the following expression (1): 3 ⁢ λ 4 ⁢ ⁢ n + 0.30 × ( λ 4 ⁢ ⁢ n ) ≤ T ≤ 3 ⁢ λ 4 ⁢ ⁢ n + 0.45 × ( λ 4 ⁢ ⁢ n ) ( 1 ) wherein λ is the light-emitting wavelength of the light-emitting element 4, and n is the refractive index of the transparent electrode layer 6.