Organic electroluminescence display device

An organic electroluminescence display device comprising, from a visible side, at least:

• a circular polarization plate;
• and
• an organic electroluminescence display element having a pair of electrodes and an organic light emitting layer sandwiched therebetween,
• wherein a high refractive index layer having a refractive index of greater than 1.7 and less than 2.1 is disposed between the circular polarization plate and one of the pair of electrodes, which is positioned on the visible side,
• wherein the circular polarization plate has a polarizer, a λ/2 plate, and a λ/4 plate in this order from the visible side,
• wherein a retardation RthA (550) of the λ/2 plate in a thickness direction at a wavelength of 550 nm is within a range of greater than −120 nm and less than −40 nm,
• wherein a retardation RthB (550) of the λ/4 plate in a thickness direction at a wavelength of 550 nm is within a range of greater than −60 nm and less than 20 nm, and
• wherein an angle θ formed by a slow axis of the λ/4 plate and a slow axis of the λ/2 plate is within a range of 60±10°.