Provided is a self-supporting film that has an anti-reflection function independently, so that the self-supporting film exhibits excellent optical characteristics as a result. A self-supporting film has a rugged-structure layer having periodic rugged shapes formed on a surface thereof, with these periodic rugged shapes being formed on at least one surface. The average thickness of the self-supporting film ranges from 0.2 μm to 20.0 μm. The rugged-structure layer has a yield strain of 1% or greater and a tensile elongation of 10% or greater.