To provide a transparent optical film of low haze, while securing stably slidability between the fellow optical films without adding a fine particle.

The fine particle is not substantially contained in an inside of the optical film, both Ra1 and Ra2 are 0.5-2.4 nm, and the Ra1 and Ra2 satisfy a relation 0.8Ra1/Ra2 1.2, where Ra1 represents a surface coarseness (arithmetic means coarseness:Ra) in the optical film central part positioned in 10 m of distance from a rolled outer end of an optical roll, and where Ra2 represents a surface coarseness in the optical film central part positioned in 10 m of distance from a rolled core end of an optical roll, in this optical film roll film-formed by a fusion extrusion film forming method, and having 2,000-10,000 m of length, and a manufacturing method therefor.