LITHIUM PRIMARY BATTERY

A lithium primary battery including: a positive electrode 1 using iron disulfide as a positive electrode active material, wherein the positive electrode 1 includes a positive electrode mixture containing the positive electrode active material and a conductive agent, and a positive electrode core which is made of a porous metal member, and is filled with the positive electrode mixture, the iron disulfide has an average particle size of 20-50 µm, the conductive agent has a specific surface area of 300 m 2 /g or larger, and the iron disulfide and the conductive agent in the positive electrode mixture are mixed in a mass ratio of 97:3-93:7.