Antireflection film and method for preparing same

An antireflection film comprising:

• a hard coating layer or an antiglare layer;
• and
• a low refractive index layer formed on one side of the hard coating layer or the antiglare layer and including a binder resin, and hollow silica nanoparticles, metal oxide nanoparticles, and inorganic nanoparticles dispersed in the binder resin,
• wherein a first region containing the hollow silica nanoparticles, a second region containing the metal oxide nanoparticles, and a third region containing the inorganic nanoparticles are present in the low reflective index layer, and
• the first region, the second region, and the third region satisfy the following Equation 1:
• Refractive Index (n1) of First Region<Refractive Index (n3) of Third Region<Refractive Index (n2) of Second Region [Equation 1]
• wherein n1, n2, and n3 are refractive indexes obtained by carrying out Ellipsometry measurement at an incident angle of 70° over a wavelength range of 380 nm to 1000 nm.