Provided are a red light emitting fluorescent material excellent in durability, and a method for producing the red light emitting fluorescent material. The present disclosure provides a method for producing a fluoride fluorescent material that includes subjecting a mixture that contains a fluoride in a liquid medium to a pressurization treatment and a heating treatment, the fluoride having a chemical composition represented by the following formula (I). The present disclosure also provides a fluoride fluorescent material that exhibits a rate of decrease in light-emitting energy efficiency is 5% or less after the fluoride fluorescent material is irradiated with laser light having a wavelength of 445 nm at an optical density of 3.5 W/cm2 for 300 seconds, and has a chemical composition represented by the following formula (I). A2[M1-aMn4+aF6]  (I) In the formula (I), A represents at least one cation selected from the group consisting of K+, Li+, Na+, Rb+, Cs+ and NH4+, M represents at least one element selected from the group consisting of Group 4 elements and Group 14 elements, and a represents a number that satisfies 0