A light control film having a refractive index n and an uneven, irregular surface pattern provides a reasonable level of light diffusion without a glare problem provided, for any cross-section perpendicular to the base plane of the film, the average of absolute values of slope .theta..sub.ave of a curve along the edge of the cross-section contoured by the rough surface pattern (profile curve) is at least 78-34n degrees and no higher than 118-34n degrees, or the average of absolute values of slope .theta..sub.ave of a profile curve to the length L1 of a straight line defined by the intersection of the base plane and the cross-section satisfies the following formula (3) or (4) for substantially all cross-sections. .theta..sub.ave/Lr.times.n.sup.2.gtoreq.40 (3) 50.ltoreq..theta..sub.ave.times.Lr.times.n.sup.2.ltoreq.135 (4)