An apparatus for producing a fluoride crystal, which has a chamber, a window material and the like capable of dealing with the fluoride, is equipped with facilities necessary for high vacuum evacuation, and uses a crucible in which the capillary portion of the hole formed in the bottom thereof is so controlled for a seed crystal and a molten material to be easily contacted to each other; and a method for producing a fluoride crystal comprising using the apparatus. The apparatus allows the production of a single crystal of a fluoride having high quality in a extremely short time with stability.