Disclosed herein are a photosensitive resin composition and an organic insulating film prepared therefrom. By optimizing the weight average molecular weight of an alkali-soluble resin and the amount of each component in the photosensitive resin composition, a coated film obtained therefrom may have high planarity property and patterns with high resolution. Accordingly, the photosensitive resin composition may be used as a material for an organic insulating film simultaneously functioning as white pixels in a liquid crystal display.