There are provided an antireflector having a simple layer structure, a high visible light transmittance, a low visible light reflectance and an excellent anti-fingerprint property, and a display device having an excellent viewability.An antireflector 1 including a substrate 10 and an antireflection film 20; the antireflection film 20 having a first high refractive index layer 22, a metal layer 24, a second high refractive index layer 26 and a low refractive index layer 28 disposed therein sequentially from a substrate side facing the substrate 1; the first high refractive index layer containing at least one member selected from the group consisting of tin, gallium and cerium in the form of an oxide, and indium in the form of an oxide; the metal layer containing silver and palladium and having a palladium content of from 3 to 20 mass % relative to the total amount of the metal layer (100 mass %); the second high refractive index layer containing at least one member selected from the group consisting of tin, gallium and cerium in the form of an oxide and indium in the form of an oxide. A display device including the antireflector 1 disposed on an observer' side of a display panel.