To provide a novel fluoroadamantane derivative, a novel polymerizable fluoroadamantane derivative and a novel fluoropolymer, and processes for production thereof. To provide the following compound (3), the following compound (4), a polymer obtained by polymerizing the compound (4) and processes for production thereof: ##STR00001## provided that Q represents --CHF-- or --CF.sub.2-- (provided that six Qs may be the same or different), Z represents --H, --F or --CH.sub.2OH (provided that three Zs may be the same or different), W represents --H or a C.sub.1-10 hydrocarbon group, R represents --H, --F, --CH.sub.3 or --CF.sub.3, and J represents --H, --F, --CHWOH or --CHWOCOCR.dbd.CH.sub.2 (provided that three Js may be the same or different).