A negative electrode active material for aqueous secondary batteries, said negative electrode active material being applied to an aqueous secondary battery that uses an aqueous electrolyte solution containing water and a lithium salt, wherein: the negative electrode active material contains graphite; the graphite has a C—F bond group on the surface; if I688eV is the peak intensity at around 688 eV ascribed to a C—F bond and I284eV is the peak intensity at around 284 eV ascribed to a C—C bond in the XPS spectrum of the graphite as obtained by X-ray photoelectron spectroscopy, the ratio of the peak intensity I688eV to the peak intensity I284eV (namely, the value of I688eV/I284eV ) is from 0.1 to 7; and the BET specific surface area is from 0.5 m2/g to 3.9 m2/g.