There is provided a fluorine-containing polymer having a repeating unit of the general formula (2) and produced by homopolymerization or copolymerization with an other polymerizable double bond-containing monomer. In the formula, W represents a linking group; R1 each independently represents a perfluoroalkyl group; Q represents a unit structure formed by cleavage of a double bond of a polymerizable double bond-containing group; and M+ represents a hydrogen cation, a metal ion or a quaternary ammonium ion.There is also provided an antistatic agent using the above fluorine-containing polymer such that the antistatic agent can impart antistatic performance to an article stably over a long time and show excellent transparency.