The sufficient removal of chromium metal from bottom ash obtained by incineration of tannery sludge was assessed in this study. Fundamental properties of bottom ash were characterized. Chromium metal that exist in the bottom ash seem to be dissolved by acid treatments. This study shows that chromium metal in bottom ash can be removed easily by treating a bottom ash with oxalic acid, hydrochloric acid and water. Hydrochloric acid showed good removal rate of chromium metal comparable to those by oxalic acid.