An object of the present invention is to provide a novel method for producing a fluorine-containing methylene compound. The above object can be achieved by a method for producing a compound represented by formula (1): wherein R1 represents an organic group, RA represents hydrogen or fluorine, R4a represents hydrogen or an organic group, R4b represents hydrogen or an organic group, R5a represents hydrogen or an organic group, R5b represents hydrogen or an organic group, and R2 represents hydrogen or an organic group; R2 is optionally connected to R4a to form a ring; the method comprising step A of reacting a compound represented by formula (2): wherein X1 represents a leaving group, and other symbols are as defined above, with a compound represented by formula (3): wherein X2 represents a leaving group, and other symbols are as defined above, in the presence of a reducing agent as desired, under light irradiation.