Abstract: A forgery prevention structure for CD containers includes a window provided on a surface of a CD container and having a plurality of equidistant elongated projections thereby forming a light gate, a sheet of paper with a pattern which is composed of a plurality of transverse lines which match with the projections of the light gate, whereby one can see different lines of the pattern through the light gate from different angles, which resembles a motion picture or variation of the pattern by moving the CD container.