A
radiation-sensitive composition includes (A) a first
polymer which becomes alkali-soluble by the action of an acid and does not contain a
fluorine atom, (B) a second
polymer having a repeating unit (b1) shown by the following formula (1) and a
fluorine-containing repeating unit (b2), and (C) a
radiation-sensitive acid generator, the content of the second
polymer (B) in the composition being 0.1 to 20 parts by
mass relative to 100 parts by
mass of the first polymer (A).wherein R1 represents a monovalent
organic group, and R8 represents a linear or branched
alkyl group having 1 to 12 carbon atoms. The composition can form a
resist film capable of suppressing defects inherent to liquid
immersion lithography such as
watermark defects and bubble defects.