The present invention provides an organic EL display device in which external light reflection and tinting are suppressed when viewed from a front and an oblique direction, and includes a polarizer, a first optically anisotropic layer, a λ/4 plate, and an organic EL display panel in this order from a viewing side, where an angle formed between an absorption axis of the polarizer and an in-plane slow axis of the λ/4 plate is within a range of 45±3°, an Nz factor of the first layer is −0.1 or more and 1.1 or less, the absorption axis of the polarizer is parallel with or orthogonal to the in-plane slow axis of the first layer, and Re(550), which is an in-plane retardation value of the first layer measured at a wavelength of 550 nm, satisfies the following Equation (X). 100 nm≤Re(550)≤450 nm.  Equation (X)