To provide a transparent resin layer for use in an organic EL panel, capable of solving a problem with light extraction efficiency caused by the wavelength dependency (wavelength dispersion) of the refractive index of light. A transparent resin layer 12 for use in an organic EL panel includes: a transparent resin 121; and first fine particles 122 having an average particle diameter from 300 to 50000 nm and second fine particles 123 having an average particle diameter from 1 to 300 nm dispersed in the transparent resin 121, and the fine particles have a function as at least either a light scattering material or a light-dispersing material. Alternatively, a transparent resin layer 42 for use in an organic EL panel includes a transparent resin 421 having an uneven structure, the uneven structure includes first projections 422 in which at least either the widths or the heights are from 300 to 1000 nm and second projections 423 in which at least either the widths or the heights are from 10 to 300 nm, and at least either the shapes or the sizes of the projections in the uneven structure have no periodicity.