Nitrogen-containing cellulose derivatives hydrazinodeoxycellulose (HDC) and carboxyalkyl hydrazinodeoxycelluloses (alpha- and beta-CAHDCs) were prepared from 6-chlorodeoxycellulose (CDC). Their adsorption of divalent transition metal ions was determined from dilute aqueous solutions and compared with that of aminoalkyl celluloses (AmACs) reported previously. HDC scarcely adsorbs metal ions in the pH range of 1-2, whereas alpha- and beta-CAHDCs adsorb metal ions in this pH range. However, the adsorption of metal ions on HDC increases rapidly with increasing pH and HDC more effectively adsorbs metal ions than alpha- and beta-CAHDCs in weakly acidic conditions. The ability to adsorb Cu2+ ions was in the order of AmAC (carbon number in the diamine moiety m = 2) > HDC > alpha-CAHDC > beta-CAHDC in the weakly acidic region. These adsorbents selectively adsorb Cu2+ ions from the solutions containing other metal ions such as Mn2+, Co2+, and Ni2+, and the Irving-Williams series is obeyed in these adsorbent/metal ion systems.