Antireflection substrate

An antireflection substrate which has a predetermined elongation percentage of 120% to 160%, comprising:

• a resin substrate;
• and
• an underlying layer, a hard coat layer, an antireflection layer, and a cover layer which are provided on the resin substrate in this order,
• wherein the underlying layer is formed of a cured material of a hexafunctional or higher functional urethane (meth)acrylate compound (A1),
• the hard coat layer contains a cured material of a urethane (meth)acrylate compound (A) containing 60% by mass or more of a trifunctional or less functional urethane (meth)acrylate compound (A2),
• the antireflection layer includes an intermediate refractive index layer having a refractive index of 1.50 to 1.75, a high refractive index layer having a refractive index of 1.60 to 2.00, and a low refractive index layer having a refractive index of 1.25 to 1.40 in this order from the hard coat layer side, the refractive index of the high refractive index layer being higher than that of the intermediate refractive index layer, and the intermediate refractive index layer, the high refractive index layer, and the low refractive index layer all contain a cured material of an organic/inorganic composite compound (B),
• the cover layer includes a cured material of the organic/inorganic composite compound (B), and
• the organic/inorganic composite compound (B) is a composite compound having a structure in which an alkoxysilyl group is bonded to any of a bisphenol A-type epoxy resin, a novolac phenol resin, and a polyamic acid.