Cobalt K-edge and Pb L-III-edge XANES spectra were obtained by fluorescent XANES using solid state detector (SSD) for Co and Pb in natural rocks, ferromanganese nodules. The XANES spectra suggest that Co(III) and Pb(II) are their main oxidation states in ferromanganese nodules. Based on the results, enrichment mechanisms of Co and Pb in ferromanganese nodules were discussed.