To provide a fluorine-containing 2-block copolymer that has a good water and oil repellency, produced by using fluorine-containing (meth)acrylic acid ester that has a low bio-accumulativeness, as a raw material. Provided is a fluorine-containing 2-block copolymer produced by: (method A) a method for producing a fluorine-containing 2-block copolymer by polymerizing a fluorine-containing (meth)acrylic acid ester represented by the following general formula (1) under the presence of tri-thiocarbonic acid ester compound and radical polymerization initiator, followed by polymerizing a non-fluorine vinyl-based monomer; or (method B) a method for producing a fluorine-containing 2-block copolymer by polymerizing a non-fluorine vinyl-based monomer under the presence of tri-thiocarbonic acid ester compound and radical polymerization initiator, followed by polymerizing a fluorine-containing (meth)acrylic acid ester represented by the following general formula (1).