To suppress generation of interference fringes without decrease in brightness on a light exiting surface side and increase in a production cost by specifying pitches of pitch unit lenses arrayed linearly or two-dimensionally.

A lens film 10 forms a lens surface 16 by arranging many unit lenses 14 of a triangle pole form on one surface (upper surface) of a transparent substrate sheet 12 so that their ridge lines 14A become in parallel with and adjacent to each other in a linear direction. The pitch (lens pitch) p of the unit lenses 14 in the arrayed direction exceeds 1 μm and does not exceed 23 μm. When this lens film 10 is superimposed on a second lens film with a configuration similar to the lens film 10 and an arbitrary lens pitch, interference pitches are not observed. Further, the lens film 10 and the second lens film are arranged so that their ridge lines 14A of the unit lenses 14 are orthogonal to each other in a plan view.