NOVELTY - An antireflection structure has on its surface an antireflection face with fine concaves. The effective area (10-90%) of the antireflection face is accounted for by the concaves. The concaves comprise basic forms which may be connected to each other. The basic forms have an average depth of 30-200 nm and an average diameter of 80-400 nm. They are irregularly arranged on the antireflection face.    USE - The inventive structure is used for an optical member, a display device, and a solar battery panel (all claimed). It is used for preventing or reducing surface reflection of light permeable members.    ADVANTAGE - The inventive structure can improve the efficiency for light utilization, and provides improved visibility. It is particularly excellent in the level of antireflection properties and its homogeneity. It can be produced in an easy and low-cost manner. It effectively prevents light reflection.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a master of forming an antireflection structure having on its surface an antireflection face with fine concaves, comprising a base material; and fine concaves provided on the base material, where 10-90% of the effective area of the antireflection face is accounted for by the concaves, and where the concaves comprise the basic forms;    (2) a process for producing a master for the formation of an antireflection structure, comprising producing the above master; forming a substrate layer on a surface of a base material optionally by an alternate adsorption method; and then, fixing fine particles on the substrate layer to form fine convexes; and    (3) a process of producing a replication mold from a master, comprising providing the above master; and preparing a metallic negative mold for replicating an antireflection structure from the master by a metal plating method.    DESCRIPTION OF DRAWING(S) - The figure is a cross-sectional view of a fine convex-type mold for the formation of a first antireflection structure.    Plate (1)    Base material sheet (2)    Fine particles (3)