The present invention relates to a polymer, a photosensitive resin composition containing the polymer, a photosensitive resin layer produced using the photosensitive resin composition, a color filterincluding the photosensitive resin layer, and a display device including the color filter. The solubility of the polymer in the organic solvent according to the embodiment is improved and the fluorescence quenching property and the spectral coherence are improved, and thus the photosensitive resin composition containing the coloring agent containing the compound as a constituent element can produce the color filer with improved heat resistance and chemical resistance. The photosensitive resin composition can be suitably used for producing a color filter and a display device having excellent brightness and contrast. This polymer uses a photopolymerizable monomer having a long chain instead of a short chain, and thus can improve pattern surface wrinkles while maintaining the sensitivity of the pattern.