An optical layered body, which has a high hardness and a fine external appearance without an interference fringe, and is excellent in optical properties and in an adhesion property between a substrate and a hard coat layer. An optical layered body includes a light-transmitting substrate; and a hard coat layer, wherein the light-transmitting substrate is made of triacetyl cellulose, the hard coat layer is a resin layer formed with a composition for forming a hard coat layer containing colloidal silica, a solvent, and pentaerythritol tri(meth)acrylate and/or dipentaerythritol hexa(meth)acrylate, an amount of the pentaerythritol tri(meth)acrylate and/or dipentaerythritol hexa(meth)acrylate is 25% by mass or more in 100% by mass of a resin solid content in the composition for forming a hard coat layer, an amount of the colloidal silica is 30 to 70% by mass in 100% by mass of a total of the colloidal silica and the resin solid content in the composition for forming a hard coat layer, and the solvent consists of solvents impermeable to the light-transmitting substrate.