A graphite material that includes a graphite containing a plurality of pores, wherein the graphite and the plurality of pores form a microstructure. When a cross-section of the microstructure is observed with a scanning electron microscope, the number of pores appearing on the cross-section is more than 250 or more per 6000 µm 2 , the average area of the pores appearing on the cross-section is 5 µm 2 or less, and the average aspect ratio of the pores appearing on the cross-section is 0.55 or less.