Pellet-type adsorbents were made from red mud, generated as a by-product during the production of aluminum hydroxide from bauxite ore. Adsorption experiments of heavy metal ions (Pb(2+), Cu(2+), Cd(2+)) in aqueous solutions by the pellet-type red mud adsorbents were studied under various experimental conditions. It was found that pellet-type red mud adsorbents made from a mixture of 58.7 wt% red mud, 25.2 wt% kaolin, 11.7 wt% sodium silicate solution, 2.9 wt% fly ash, and 1.5 wt% magnesium chloride at 600℃ exhibited the highest removal efficiency of the heavy metal ions. The removal efficiency of Pb(2+), CU(2+), and Cd(2+) after 24 h of operation was more than 95%. The pellet-type red mud adsorbents in the present study were found to follow a Langmuir equilibrium isotherm. A continuous adsorption experiment showed that the pellet-type red mud adsorbents were effective in removing Pb(2+).