Disclosed herein is a light-diffusing film for a backlight unit of a thin film transistor-liquid crystal display. Specifically, the current invention provides a light-diffusing film, including a transparent base sheet, a light-diffusing layer, which is laminated on any one surface of the base sheet and includes a light-diffusing resin and light-diffusing particles, and an antiblocking layer, which is laminated on the other surface of the base sheet and includes an antiblocking resin and antiblocking particles, in which the light-diffusing particles satisfy a predetermined relation between a specific surface area and a radius thereof. Accordingly, the light-diffusing film of the current invention can uniformly diffuse light transmitted from a light source lamp positioned at the side surface or back surface of a display device, thus realizing vivid and distinct display images.

 
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