The hydrodynamic characteristics and extraction efficiency of a multistage liquid-liquid column extractor fitted with a disc impeller with a flow channel were investigated experimentally using the systems of toluene/water and toluene/acetone/water. The distribution of drop size changed from bimodal to unimodal with increasing impeller speed. The Sauter mean diameter of the drops decreased with increasing impeller speed, but was constant over the range of the variation of the dispersed phase flow rate and continuous phase flow rate. The hold-up of the dispersed phase increased with increasing impeller speed, continuous phase flow rate and dispersed phase flow rate. The flooding flow rate of the dispersed phase decreased with increasing continuous phase flow rate, and decreased via a maximum value with increasing impeller speed. The theoretical stage number per unit column height increased with increasing total flow rate of continuous and dispersed phases, and decreased via a maximum value with impeller speed. The extractor performance in the present column evaluated by the theoretical stage number was about the same as those of agitated extractors in the literature.