The present disclosure provides a negative electrode active material for a fluoride ion battery capable of realizing high charge and discharge capacity, a fluoride ion battery having such a negative electrode active material, and a method for producing such a negative electrode active material for a fluoride ion battery. The negative electrode active material for a fluoride ion battery of the present disclosure has a transition metal carbide having a non-layered structure. The method of the present disclosure for producing a negative electrode active material for a fluoride ion battery comprises applying mechanical impact to a transition metal carbide having a layered structure to convert the transition metal carbide to a transition metal carbide having a non-layered structure.