This invention provides a fluorocopolymer excellent in transparency and in mechanical strength at ordinary temperature and high temperatures and film comprising the same. The fluorocopolymer comprises units derived from ethylene, units derived from tetrafluoroethylene, units derived from hexafluoropropylene, and units derived from a perfluoro(alkyl vinyl ether), wherein the molar ratio of the units derived from ethylene to the units derived from tetrafluoroethylene is from 10/90 to 60/40, the amount of the units derived from hexafluoropropylene is 0.1 to 1.0 mol% based on all units, and the amount of the units derived from a perfluoro(alkyl vinyl ether) is 0.1 to 1.0 mol% based on all units.