<p>A manufacturing method of an optical member (30) includes forming an optical film (320) having a first glass transition temperature and including a pattern (322) formed on a surface thereof, and an optical plate (310) having a second glass transition temperature, the second glass transition temperature being lower than the first glass transition temperature; disposing the optical film (320) and the optical plate (310) adjacent each other so that the pattern (322) faces the optical plate (310); and pressurizing the optical film (320) and the optical plate (310) while heating the optical plate (310) to the second glass transition temperature or greater.
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