Disclosed is a fluorine gas generation apparatus which comprises: an electrolytic cell wherein a first air space, into which a main product gas that is mainly composed of a fluorine gas generated at a positive electrode immersed in a molten salt is led, and a second air space, into which a by-product gas that is mainly composed of a hydrogen gas generated at a negative electrode immersed in the molten salt is led, are divided and separated above the liquid level of the molten salt; and a purification device for purifying the fluorine gas by solidifying and collecting a hydrogen fluoride gas using a refrigerant, said hydrogen fluoride gas having evaporated from the molten salt and mixed into the main product gas generated at the positive electrode. The refrigerant used for the purpose of solidifying the hydrogen fluoride gas in the purification device and then discharged is reused as a utility gas that is used in various parts of the fluorine gas generation apparatus.