Provided are a photosensitive composition containing a resin which includes a structural unit A represented by Formula (1) or (2) and a structural unit B represented by Formula (3), (4), or (5); and a radically polymerizable monomer, an image forming method, a film forming method, a resin, an image, and a film. R11, R21, R31, R41, and R51 represent H or a hydrocarbon group, R12 to R14 and R22 to R24 represent a hydrocarbon group, H, or an OH group, R42, R43, R52, and R53 represent H or a hydrocarbon group, L1 to L3 represent a single bond or a linking group, X1 represents —O— or —NR15—, X2 represent —O— or —NR25—, R15 and R25 represent H or a hydrocarbon group, and Cy1 represents a hydrocarbon group which may contain O and has a cyclic structure.