To provide a photosensitive composition, exhibiting formability of a contrasty picture without lowering sensitivity, and satisfactory, in particular, in contrast, fuzzy printing, white-light safety, and large development tolerance.

This composition contains a high-polymer compound having, at least, (a) a fluoro-aliphatic group and (b) an acidic group having hydrogen atoms bonded to carbon atoms neighboring an electron attractive group, and preferably, has, as copolymeric constituents, (a) an additionally polymerizable monomer having a fluoro-aliphatic group and (b) an additionally polymerizable monomer having an acidic group with hydrogen atoms bonded to carbon atoms neighboring an electron attractive group.