Curable composition, cured film, display device and dry film

The invention provides a curable composition, a cured film, a display device and a dry film. The curable composition has an excellent developing property when the concentration of a coloring agent is high, and thus a color filter can be formed at a high rate of finished products. The curable composition is characterized by comprising a polymer (A) and a solvent (B), wherein the polymer (A) comprises groups of substituted or non-substituted alicyclic hydrocarbon groups and polymerized unsaturated groups shown as the following formula (1) which is defined in the specification, (in the formula (1), R1 represents alkanediyl group with a carbon number of from 2 to 4, R2 represent an aliphatic hydrocarbon group, n represents an integer from 1 to 100, and * represents a binding site, wherein when n is 2 or greater, the plurality of R1s may be different or not.)