Disclosed are a film-type light guide plate capable of readily securing mass-production and realizing low weight and slimness, a method for manufacturing the same and a backlight unit using the same. The method includes loading a base film on a movable first conveyor belt, coating a liquid ultraviolet curable resin on the first surface of the base film, rotating a surface-treated roll on the coated ultraviolet curable resin to form a prism pattern provided with a first protrusion pattern, and curing the prism pattern using an ultraviolet lamp.