To provide a method by which a fluorine-containing copolymer can be produced while safely feeding monomers containing tetrafluoroethylene.

This method for producing the fluorine-containing polymer comprises additionally feeding the monomers in a larger amount than that of the monomers consumed by the polymerization to the reactional system after initiating a reaction, taking out the excessive unreacted monomers from the reactional system, thereby reacting the monomers while keeping the composition of the monomers present in the reactional system at substantially the same composition of the initially charged monomers and adding a substance having actions of suppressing the self-explosion of the monomers to the monomers additionally fed to the reactional system in the method for producing the fluorine-containing polymer comprising polymerizing the monomers containing the tetrafluoroethylene by a batch polymerization.