Fluoride-ion all-solid-state batteries with high energy densities are promising replacements for lithium-ion batteries. Herein, we report Pb 2 CuF 6 , which has a fluorite-related structure, as a cathode material for use in fluoride-ion batteries. The Pb 2 CuF 6 cathode composite reacted to charging and discharging without the addition of a solid electrolyte. It exhibited a capacity of 319 mA h cm −3 per electrode volume during the first discharge, exceeding that of the conventional CuF 2 electrode. The discharge capacity of Pb 2 CuF 6 remained at 24% of the theoretical capacity, even at 1 mA cm −2 (corresponding to a rate of 0.77C), and the Cu utilization ratio was approximately four times higher than that of a CuF 2 cathode. β-PbF 2 , a fluoride-ion conductor, and metallic Cu were formed during the discharging process of Pb 2 CuF 6 ; during the subsequent charging process, Pb 2 CuF 6 was formed again. All products of the charge−discharge reaction were present in a nanoparticle form. Pb 2 CuF 6 exhibited an ionic conductivity of 3.0 × 10 −5 S cm −1 at 140 °C. The high-rate performance of Pb 2 CuF 6 is attributed to both the high ionic conductivity of the reaction products and the formation of nanoparticles. These findings are beneficial for the material design to improve the charge−discharge performance of electrode materials for fluoride-ion batteries.